OCT .A&, 3 1 15 1996 @NGINEERING DATA TRANSMITTAL

2. TO: (Receiving Organization) 3. Frm! (Or ig ina t ing organ iza t ion)

5 . Proj. /Prog.lDept. lDiv.: 6. Design Authority1 Design AgentlCog. Distribution Criticality and Shielding

Engr.: S. R. Gedeon

8. Or ig ina tor Remarks:

PaOD 1 of I ~ E D T 619217

w No 11. Receiver Remarks: 11A. Design Baseline Document? [ ] Yes

Categorizing and Inventorying Waste in Standard Containers

4 . Related EO1 No.:

7 . Purchase Order No.: 619217

9. Equip./Cornponent No.:

10. SystemlBldg . lFac i l i ty :

12. Major Assm. Dwg. No.:

13. Pern i t lPermi t Appl ica t ion No.:

14. Required Resrxlnse Date: - (F)

Approval Desig- nator

- Origi- nator

0,spo- sition

(H)

-

lb ..-,

Reason for Tranrmdtal IGI D~spaartion (dl & 111 Approval Designator IF#

E. S. 1 Approvdl 4 Review I Approved 4 Revsawed no rommant U. 0 or h A I s m WhC-CM-3-5. 2 Heteaas 5 Post-Revfew 2 Approved w comment 5 Reviawad w comment sac 12 /I 3 lnlolmDtlon 6 Dist IRscaipt Acknow R e w . m d 3 D.sapproved w comment B RCC~IPI acrnowlsagad

17 SIGNATURE DISTRIBUTION

BD-7400-172-2 (05/96) GEF097

ED-7400172-1

8 WHC-SD-WM-PROC-020. Rev. 0

Procedure for Categorizing and Inventorying Waste in Standard Containers

S.R. Gedeon Westinghouse Hanford Company, Richland, WA 99352 U . S . Department o f Energy Contract DE-AC06-87RL10930

EDT/ECN: 619217 UC: 512 Org Code: 403 Charge Code: E09161 B&R Code: EW3130010 To ta l Pages: W J /

Key Words: LSA, cha rac te r i za t i on , waste management

Abs t rac t : A procedure f o r q u a n t i f y i n g t h e r a d i o a c t i v e m a t e r i a l con ten t o f s tandard l ow s p e c i f i c a c t i v i t y waste conta iners, based on su r face dose r a t e measurements i s g iven.

4I-d

TRADEMARK DISCLAIMER. trade name, trademark, manufacturer, or otherwise, does not necessarily const i tu te or imply i t s endorsement, recannendation, or favoring by the United States Covermnt o r any agency thereof o r i t s contractors or subcontractors.

Pr in ted i n the United States of America. TO obtain copies of t h i s docunent, contact: WHC/ECS Document Control Services, P.O. Box 1970, Mailstop H6-OB, Richland UA 99352, Phone (509) 372-2420; Fax (509) 376-4989.

Reference herein t o any specif ic cannercial product, process, or service by

Release Stamp /q?*/?&

Date

Approved for Public Release A-6400.073 (10/95) GEF321

WHC-SD-WM-PROC-020, &r/ 0

CONTENTS

1.0 INTRODUCTION . . 2.0 B A S I S AND ACCURACY . . 3.0 PROCEDURE . . . . 4.0 REFERENCES . .

F igu re 1.

F igu re 2.

F igu re 3 .

F igu re 4.

F igu re 5.

F igu re 6.

F igu re 7.

F igu re 8.

F igu re 9.

L I S T OF FIGURES

Dose Rate t o Cur ie Conversion Factor 55 Gal.

Dose Rate t o Cur ie Conversion Factor 85 Gal.

Dose Rate t o Cur ie Conversion Factor 3 ' x 3 '

Dose Rate t o Cur ie Conversion Factor 2 ' x 2 '

Dose Rate t o Cur ie Conversion Factor 5 ' x 5 '

Dose Rate t o Cur ie Conversion Factor 5 ' x 5 ' (LMB 111) . . . . . . . . . . . . . . . . . Dose Rate t o Cur ie Conversion Factor 4 ' x 4 '

Dose Rate t o Cur ie Conversion Factor 4 ' x 4 ' Box . . . . . . . . . . . . . . . . . . . . Dose Rate t o Cur ie Conversion Factor 4 ' x 4 '

L I S T OF TABLES

Table 1. C a l c u l a t i o n a l Worksheet . . . . . . . .

2

2

3

. . 19

Drum . . . . Drum . . . . . . x 6 ' Metal Box . x 6 ' Metal Box . x 9 ' Metal Box . x 6 ' Metal Box . . . . . . . . . x 8 ' Wood box . . x 7.5' Metal . . . . . . . . . x 8 ' Wood Box . .

10

11

16

17

18

8

1

WHC-SD-WM-PROC-020, &CV, 0

PROCEDURE FOR CATEGORIZING AND INVENTORYING WASTE I N STANDARD CONTAINERS

1.0 INTRODUCTION

The at tached procedure i s a method f o r us ing sur face dose r a t e measurements t o ca tegor i ze and inven to ry t h e r a d i o a c t i v e waste i n a con ta ine r . Th i s procedure i s based on c a l c u l a t i o n s t h a t r e l a t e t h e i nven to ry t o t h e su r face dose r a t e (Gedeon 1996).

2.0 BASIS AND ACCURACY

These c a l c u l a t i o n s (Gedeon 1996) a l so examined t h e parameters t h a t a f f e c t t h e su r face dose ra te - to - rad io i so tope inven to ry r e l a t i o n s h i p . leads t o t h e f o l l o w i n g conclus ions and requirements:

Th is

1. The su r face dose r a t e i s r e l a t i v e l y i n s e n s i t i v e t o t h e composi t ion o f t he waste ma te r ia l ; t he re fo re , a s i n g l e (upper l i m i t composit ion) curve y i e l d s a m i l d l y conserva t i ve i nven to ry . Th is conserva t i ve b i a s accommodates some o f t h e u n c e r t a i n t y assoc iated w i t h t h e method.

For t h e waste streams evaluated, t h e sur face dose r a t e i s dominated by 137Cs. i nven to ry o f 137Cs, a conserva t i ve b i a s i s i n t roduced i n t o t h e o v e r a l l i nven to ry de te rm ina t ion and c a t e g o r i z a t i o n . The g r e a t e r t h e su r face dose c o n t r i b u t i o n o f isotopes o the r than 137Cs, t h e g r e a t e r t h e b ias . t h e u n c e r t a i n t y o f t h e method.

Th is procedure i s o n l y app l i cab le i f 137Cs i s known t o e x i s t i n t h e waste i n s i g n i f i c a n t amounts.

Th is procedure should n o t be used i f t h e waste i s known t o con ta in s u f f i c i e n t q u a n t i t y o f o the r dose dominate isotopes, such as 6oCo.

m a t e r i a l , w i l l n o t i n t roduce s i g n i f i c a n t e r r o r i n t o t h e i nven to ry determinat ion.

2 . By assuming t h e sur face dose r a t e de f i nes t h e

These conserva t i ve b iases g e n e r a l l y accommodate

3 .

4.

5. Voids, l o c a t e d w i t h i n otherwise un i fo rm ly d i s t r i b u t e d waste

6. Loca l i zed source concentrat ions, o t h e r than those c e n t r a l l y d i s t r i b u t e d , can be detected by the v a r i a t i o n i n i n d i v i d u a l su r face dose r a t e readings from the average. For s tandard con ta ine rs , a Max/Avg r a t i o g rea te r than 2.5 i n d i c a t e s t h e source d i s t r i b u t i o n t o be s i g n i f i c a n t l y heterogeneous.

2

WHC-SO-WM-PROC-020, /4e/ 0

7. I f t h e r e i s reason t o b e l i e v e t h e i nven to ry i s approx imate ly a c e n t r a l l y l oca ted p o i n t source o r o the r s i g n i f i c a n t l y heterogeneous source, i t i s always conserva t i ve t o assume t h e p o i n t source op t i on . A l t e r n a t e l y the con ta ine r can be analyzed ou ts ide o f t h i s procedure as a specia l case.

Measured dose r a t e s are t o be con tac t readings made w i t h a CP meter. The c a l c u l a t i o n s assume t h a t t he cen te r o f t h e CP d e t e c t o r volume i s approx imate ly 2 inches from the con ta ine r sur face. I f an inst rument o the r than a CP i s used, ca re must be taken t o ensure t h a t t he cen te r o f that d e t e c t o r volume i s 2 inches from the con ta ine r sur face.

The 6 p o i n t s where t h e dose r a t e s should be measured a re t h e geometric cen te r o f each face o f t h e con ta ine r . o f t h e meadurements should be taken 90" apa r t on t h e circumference, half-way a long t h e l e n g t h o f t h e b a r r e l .

For l a r g e con ta ine rs , i t may be necessary t o take more than 6 readings. 4 ' x 8 ' wood boxes. S p e c i f i c a l l y , i f general con tac t readings a long the l e n g t h o f t h e box va ry by a f a c t o r o f 2.5 o r more, then a 14 p o i n t survey should be performed.

The suppor t i ng c a l c u l a t i o n s (Bunch) were performed w i t h t h e MCNP (Monte

8.

9. For b a r r e l s , f o u r

10. An a l t e r n a t i v e procedure i s a v a i l a b l e f o r use w i t h 4 ' x

Car lo N-Par t i c l e ) computer code (B r iesme is te r e t a1 1993, Car te r 1994).

3.0 PROCEDURE

1. Enter the c u r i e s o f each i so tope i n t h e waste stream mix i n column 2 o f Table 1. t h e t a b l e o r i d e n t i f y an approp r ia te re ference.

2 . Sum t h e c u r i e values i n column 2 and e n t e r t h e va lue a t t h e bottom o f t he column i n the space f o r I.

3. Normalize t h e waste stream mix o f Category 1 c o n s t i t u e n t s by d i v i d i n g t h e c u r i e va lue o f each i so tope i n column 2 by t h e sum 1 o f column 2. The sum o f column 3 should be u n i t y .

A t tach a re fe rence copy o f t he Waste Stream Mix t o

4. Obta in t h e s i x su r face dose r a t e values and e n t e r these i n t h e work sheet, i n c l u d i n g i n fo rma t ion concerning t h e r a d i a t i o n d e t e c t o r (see i t em 8, above). An op t i ona l 14 p o i n t survey work sheet i s a v a i l a b l e f o r 4 ' x 4 ' x 8 ' wood boxes. Th is o p t i o n should be se lected i f the dose v a r i e s a long t h e l e n g t h o f t he box by more than a f a c t o r o f 2.5.

3

WHC-SD-WM-PROC-020, /?e*! D

5 . Obtain average su r face dose r a t e by summing t h e s i x readings (14 readings i f t h a t o p t i o n i s se lected) and d i v i d i n g t h e sum by s i x ( o r 14 i f app l i cab le ) . Subtract background. Record co r rec ted average on work sheet.

Note: Convert t h e co r rec ted averaqe va lue read ins i n t o u n i t s R/hr even

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

though they were obta ined as cpm, mR/hr, OF o the r .

D i v i d e t h e background co r rec ted maximum o f t h e s i x i n d i v i d u a l readings by the background co r rec ted average va lue and e n t e r t h i s on t h e worksheet as the Max/Avg value.

Weigh t h e waste con ta ine r and e n t e r t h i s va lue on t h e worksheet.

Sub t rac t t h e standard empty con ta ine r weight from t h e gross weight obta ined i n s tep 7 and en te r t h i s n e t weight va lue on t h e worksheet.

Using t h e n e t weight from step 8 , go t o the approp r ia te at tached f i g u r e f o r t h e t ype o f con ta ine r t o determine t h e C i o f 137Cs pe r R/hr. 2.5, use the homogeneous ( d i s t r i b u t e d source) curve. I f the Max/Avg va lue from step 6 i s g rea te r than 2.5 use t h e heterogenous ( p o i n t source) curve, o r sub jec t t h e con ta ine r t o an a l t e r n a t i v e assay procedure o r a case-by-case assessment.

M u l t i p l y t h e C i o f 137Cs pe r R/hr from step 9 by t h e average su r face dose r a t e va lue ( i n R/hr) from step 5. va lue o f 137Cs i n column 4 i n t h e 137Cs row o f Table 1.

D i v i d e t h e C i va lue f o r 137Cs i n Column 4 by t h e va lue f o r 137Cs i n column 3 and e n t e r t h i s va lue i n t h e space f o r " f a c t o r " a t t h e t o p o f column 4. i nven to ry o f o t h e r rad io i so topes .

M u l t i p l y each c u r i e va lue i n Column 3 by t h e no rma l i z ing " f a c t o r " a t t h e t o p o f Column 4 (see s tep 11) and e n t e r t h e r e s u l t i n g va lue f o r each i so tope i n t h e approp r ia te row i n Column 4.

Enter t he standard volume o f t he con ta ine r on t h e worksheet.

D i v i d e t h e c u r i e i nven to ry i n each row o f Column 4 by the standard con ta ine r volume from t h e worksheet t o o b t a i n t h e c u r i e s pe r cub ic meter f o r each rad io i so tope t h a t has a known Category 1 l i m i t .

D i v i d e t h e c u r i e concen t ra t i on o f each i so tope i n Column 5 by i t s Category 1 l i m i t l i s t e d i n Column 6 and e n t e r t he r e s u l t i n g va lue i n Column 7 as t h e f r a c t i o n a l c o n t r i b u t i o n o f t he isotope.

I f t h e Max/Avg va lue i n s tep 6 i s equal t o o r l e s s than

Enter t h i s c u r i e

Th is i s t h e f a c t o r f o r q u a n t i f y i n g t h e c u r i e

4

WHC-SD-WM-PROC-020, 0

Note: The fractional contributions might vary by several orders of

16.

magnitude; therefore, care must be taken in recording each value.

Sum the fractional contributions of each isotope in Column 7 to obtain the value for the container. Enter this value at the bottom of Column 7 .

correctly taken into account. Note: Be sure the decimal point for each fractional contribution is

5

WHC-SD-WM-PROC-020, /4ed 0

WORKSHEET FOR STANDARD CONTAINERS

SURFACE DOSE RATE MEASUREMENTS

Inst rument C a l i b o r Cer t

Sur face dose r a t e s Side 1 Side 2 Side 3 Side 4 TOP B o t t o m

Max Reading Background (-) Max Net va lue

Sum d i v i d e by 6 = Background (-) Average

Max/Avg =

CONTAINER INFORMATION

Type Empty weight kg-Volume m3

Scale i n f o r m a t i o n

Gross weight ( k i 1 ograms) Empty weight ( k i 1 ograms) Net weight (use t h i s va lue i n s tep 9)

6

WHC-SD-WM-PROC-020, / e d 0

OPTIONAL WORKSHEET FOR LARGE WOODEN BOX ( 4 ' x 4 ' x 8 ' )

SURFACE DOSE RATE MEASUREMENTS

Inst rument C a l i b o r Cer t

Sur face dose r a t e s * ~ _ _ _ _ Side 1

Side 2 Side 3

~ _ _ _

Max Reading Background ( - ) Max Net va lue

Sum d i v i d e by 14 = Background (-) Average

Max/Avg =

CONTAINER INFORMATION

Type 4 ' x 4 ' x 8 ' wood box Empty weight-277 k q Volume-3.6 m3

Scale i n f o r m a t i o n

Gross weight ( k i 1 ograms) Empty weight ( k i 1 ograms) Net weight (use t h i s va lue i n s tep 9)

'Measurements should be taken at 2 foot intervals along the long centerline of the long ( 4 ' x 8 ' ) faces, and at the center of the end (4' x 4 ' ) faces.

7

WHC-SD-WM-PROC-020 REV 0

Table 1. C a l r u l a t i o n a l Worksheet (Sheet 1 o f 2 )

8

WHC-SO-WM-PROC-020 REV 0

I l l

ISOTOPE

T a b l e 1. C a l c u l a t i o n a l Worksheet (Sheet 2 o f 2 )

121 131 141 151 161 171

CI CiiCi Factor = - CiiM3 FRACTION 15V161 WASTE STREAM MIX, NORMALIZED MIX CiiCONTAlNER Col141 VOLUME CATEGORY 1 LIMIT CATEGORY 1

9

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WHC-SD-WM-PROC-020, K Y 0

Figure 9. Dose Rate to Curie Conversion Factor 4' x 4' x 8' Wood Box

p I w,

m P O ~ I I L SIC. 6pl S U ~ V C Y

o Dist. Sic. 141~1 survey

o Poinl Src. 14pl survey

.........................................

. . . . . . . . . . . . . . . . . . . . .

. .............................

*/'/ < /.x.

.- .... .... c .........

........ m-.--.--".

2.0 ' I I I I 500 I000 I500 2000 2500 0

Box Net Mass (kg)

18

WHC-SD-WM-PROC-020 REV 0

4.0 REFERENCES

Gedeon, S. R. e t a l , "Basis f o r Dose Rate t o Cur ie Assay Method", WHC-SD-WM- RPT-267, Westinghouse Hanford Company, Richland, Washington, 99352, dated October 1996.

B r iesme is te r , J . F., E d i t o r , "MCNP -- A General Monte Car lo N - P a r t i c l e Transpor t Code. Vers ion 4A", LA-12625, Los Alamos Na t iona l Laboratory , Los Alamos, New Mexico, dated 1993.

Computer P lat forms" , ECN 186710, dated January 4, 1994. Car te r , L. L. and R. A. Schwarz, " C e r t i f i c a t i o n o f MCNP Vers ion 4A f o r WHC

19

CHECKLIST FOR INDEPENDENT TECHNICAL REVIEW

DOCUMENT REVIEWED Procedure f o r Cateoor iz inq and I n v e n t o r v i n q Waste i n

AUTHOR( s ) S. R. Gedeon Standard Containers

I . Method(s) o f Review

11.

I 1 1

I V .

I n p u t data checked f o r accuracy Independent c a l c u l a t i o n performed ( ) Hand c a l c u l a t i o n ( A A l t e r n a t e comwte r code: D W H a

C h e c k l i s t ( e i t h e r check o r en ter NA i f n o t app l ied)

Task complete ly de f ined A c t i v i t y c o n s i s t e n t w i t h task s p e c i f i c a t i o n Necessary assumptions e x p l i c i t l y s t a t e d and supported Resources p r o p e r l y i d e n t i f i e d and referenced Resource documentation appropr ia te f o r t h i s a p p l i c a t i o n I n p u t data e x p l i c i t l y s t a t e d I n p u t data v e r i f i e d t o be cons is ten t w i t h o r i g i n a l source Geometric model adequate representa t ion o f ac tua l geometry M a t e r i a l p r o p e r t i e s appropr ia te and reasonable Mathematical d e r i v a t i o n s checked i n c l u d i n g dimensional cons is tency Hand c a l c u l a t i o n s checked f o r e r r o r s Assumptions e x p l i c i t l y s t a t e d and j u s t i f i e d Computer sof tware appropr ia te f o r task and used w i t h i n range o f V a l i d i t y Use o f resource ou ts ide range o f e s t a b l i s h e d , v a l i d i t y i s j u s t i f i e d Software runstreams c o r r e c t and c o n s i s t e n t w i t h r e s u l t s Software ou tpu t c o n s i s t e n t w i t h i n p u t Resul ts c o n s i s t e n t w i t h a p p l i c a b l e prev ious exper imenta l o r a n a l y t i c a l f i n d i n g s Resul ts and conclus ions address a l l p o i n t s and are c o n s i s t e n t w i t h t a s k requirements and/or es tab l i shed l i m i t s o r c r i t e r i a Conclusions c o n s i s t e n t w i t h a n a l y t i c a l r e s u l t s and e s t a b l i s h e d l i m i t s Uncer ta in ty assesment appropr ia te and reasonable Other ( d e f i n e )

Comments :

REVIEWER: 94- DATE : / o/28/9G I -

DISTRIBUTION SHEET To D i s t r i b u t i o n

From Page 1 of 1 C r i t i c a l i t y and S h i e l d i n g Date October 11,

1996

A-6000-135 (01/93) UEF067

Project Title/Work Order Procedure For Categor iz ing and I n v e n t o r y i n g Waste i n Standard Containers

EDT No. 619217 ECN NO.

Name Text Text Only Attach./ EDT/ECN

MSlN With All Appendix Only Attach. Only