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FLORIDA POWER & LIGHT COMPANY

May 19, 1983L-83-310

Office of Nuclear. Reactor RegulationAttention: Mr. Robert A. Clark, Chief

Operating Reactors Branch g3Division of Licensing

U. S. Nuclear Regulatory CommissionWashington, D. C . 20555

Dear Mr. Clark:

Re: St. Lucie Unit 1

Docket No. 50-335Post TMI RequirementsAddi tional Accident Monitoring Information

In your letter which we received on January 18, 1983, you'indicated that theNRC staff was conducting a post-implementation review of NUREG-0737 ItemsII.F.1.4., II.F.1.5 and II,F.1.6. Our letter of February 17, 1983 providedyou with a date by which time our response would be submitted and a brief

~ summary of the approach we would take. Please find enclosed our response tothe staff's request for information. We trust that this information will aidthe NRC staff in ccmpleting their review.

Very truly yours,

Robert E. UhrigVice PresidentAdvanced System and Technology

REU/PKG/js—

Enclosure

cc: Mr. James P. O'Reil ly, Region IIHarold F. Reis, Esquire

8305240372 8305i9PDR ADOCK 05000335P PDR

PEOPLE... SERVING PEOPLE

EN'LOSURE

'E: 'T. LUCIE UNIT 1

DOC KET NO. 50-335POST- TMI RE(U IR EVENTS

ADDITIONAL ACCIDENT MONITORING INFORMATION

Response to Item 1 Exceptions Being Taken to NUREG-0737 Re uirements

The requi rements of NUREG-0737 for Items II.F.1.4, Contairment PressureMonitor; II.F.1.5, Containment Water Level Monitor; and II.F.1.6, ContainmentHydrogen Monitor have been met. No exceptions are requested for St. LucieUnit l.

BACKGROUND INFORMATION FOR ITEM 1

The Containment Pressure Monitors and Containment Water Level Monitors areredundant safety grade channels. All major ccmponents are qualified to IEEE323-71 and IEEE 344-71 or IEEE 323-74 and IEEE 344-75.

The Contairment Hydrogen Analyzer System consists of two hydrogen analyzers-that meet the following Reg. Guide 1.97 and NUREG-0737 requirements.,

1) A continuous indication of hydrogen concentration in thecontainment atmosphere shall be provided in the Control Room

. within 30 minutes of the initiation of safety injection underdesign basis accident conditions.

2) Measurement and read-out capability shall be provided over therange of 0-1(5 by volume of hydrogen with operating capabilityfrcm 10 psia to maximum contairment design pressure.

3) Class IE qualification to Reg. Guide 1.89 and Seismic Category Iqualification to Reg. Guide 1.100 is required.

~Res onse to Item 2 Pressure Monitorin S stem

2a) The Containment Pressure Monitor System block diagram with theequipment number for each module noted is provided in Figure l.The manufacturer and model number of each module are listed inAttachment l.

2b) Attachment 1 provides the range, accuracy, and time response for eachmodule of the Containment Pressure Data. Sheet.

2c) The individual parameters were used to calculate (using the squareroot of the sum of the'squares) the overall loop indicating andrecording accuracies for the Pressure Monitoring System. Theseaccuracies are listed in Attachment l.

2d) The 63% time response for each module is provided in Attachment l.Since these loops only provide indication and they do not actuate anyequipment, rapid time response is not a problem. The longest 63%time response for any module is 0.5 sec. This is more than an orderof magnitude shorter than the time for an operatior to read theindication and use the information to assess the present conditions.

Res onse to Item 3 Water Level Monitorin S stem

3a) The Containment Level (wide range) Monitoring System block diagram isshown in Figure 2 and the Containment Sump Level (narrow range)Monitoring System block diagram is shown in Figure 3. The manufacturerand model number of each module are listed in Attachments 2 and 3.

.3b) Attachments 2 and 3 provide the range and accuracy for each module ofthe two le'vel monitoring systems. "

Res onse to Item 4

3c) The individual module parameters were used to calculate (using thesquare root of the sum of the squares) the overall loop indicating andrecording accuracies for both the wide range and narrow range levelmonitoring systems. These accuracies are listed in Attachments 2 and 3.,

H dro en Monitorin S stem

4a) The Hydrogen Analyzer Monitoring System block diagram is shown inFigure 4.

4b & 4c)

Accuracy of each block module is not available since the manufacturerspecifies only an overall instrument accuracy of +2% of the full scaleof 0-10% hydrogen. In addition, overall system accuracy can beaffected by conditions in the inlet sample lines from the containmentsample points.

4b & 4c)

Accuracy of the Hydrogen Analyzer from the sample inlet of theanalyzer to and including the local indicating meter and the controlroom indicating meter and recorder is determined from sitecalibration records. Since an improved calibration procedure is used,the original manufacturer's data is no longer applicable. Calibrationof both Hydrogen Analyzer 'units is performed quarterly using ChemistryOperating Procedure No. 1"C-80 Revision 6.

Calibration gases are:

a) 4.5%H2, 3.0% 02, Bal N2

b) 2.9%H2, 2.0% 02 Bal N2

c) 100% N2 (Zero gas)

The calibration gases are piped directly into the sample inlet line.The calibration is performed at the Control Room panel by firstadjusting the zero potentiometer using gas c) to zero the meter.Gas a) is then introduced and the span potentiometer adjusted.Linearity is checked by introducing gas b).

Calibration records show that meters and recorder read within +0.1%hydrogen after calibration at span gas concentrations a) and b).This meets the calibration tolerance requirements as well as theHydrogen Analyzer specification requirement of +0.2% Hydrogen (2%of full scale).

4d) The placement of the seven (7) hydrogen monitor intake ports arelisted in Attachment 5.

4e) An in-containemnt inspection of the sample ports was performedon April 19, 1983 as part of a system walk downq Site supportengineers (I&C) visually inspected the sample ports and verifiedtlie absence of any physical barriers that would obstruct the hydrogen .

flow path to the sample ports.

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Containment Pressure Data

Prepared by: r44M . hate: ~ W 8 3Reviewed by~~+~Dete:

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No. Descri tion Mfr Mod No. Ran e Accurac

63%Time

ResponseIn sec

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1.89 ~ 2

ES-07-1A, 1B Cont Pressure Lambda LM-229Power Supply,

30 -60VDCAdjustableSet 45VDC

.51 negligi-ble

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1.166 .5

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PR-07-8A, 8B Cont PressureRecorder

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Overall Loop Accuracy Indication .

Overall Loop Accuracy — Recording2.22

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ATTACHMENT 2

Containment Level (wide ran e) Data

ate: ZC 534~Date: g/p)- /g.

Page 1 of 2

Ta No. Descri tion Mfr . Mod No. Ran e Accurac

63%Time

ResponseIn Sec

LT-07-13A,13B Cont Leveltransmitter

ITTBarton

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.51 NA

LIS-07-1A,lB Cont LevelIndicator

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1.166 NA

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LR-07-13/14A Cont LevelRecorder

Bailey 771 C/N -1 to 26 ft4762 Shelf (4-20 MADC)

.685

Overall Loop Accuracy — IndicationOverall Loop Accuracy » Recording

1.96 (2 )1.72 (2 )

Notes:

(l) Accuracy without LOCAAccuracy within 5 min after 1OCA is 5%Accuracy after 5 min of LOCA is 108

Prepared by:+>~ Avesta: K/i/'gReviewed by~WM~~ate: P/es/g~

Page 2 of 2

ATTACHNE2FP 2

Containment Level (wide ran e) DataCont d

(2) Overall accuracy within .5 minafter LOCA is: a. indication

b. recording5.13%5. 05't

Overall accuracy after 5 mi:nof LOCA xs: a. indication 10.06't

b. recording 10.02%

NA — Not Applicable

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ATTACHMENT 3.

Containment Sum Level (narrow ran e) Data

Date: y/~~gg

Pege 1 of 2

Ta No. Descri tion Mod No. an e Accurac

63%Time

ResponseIn Sec

LT-07-14A Cont SumpLeveltransmitter

ITTBarton

764 0-.7 ft(4-20 MADC)

1. 58 (2) NA

ES-07-1A

LIS-07-14A'S-07-2A

Cont SumpLevel PowerSupply

Cont SumpLevel Indi-cator

Cont LevelRec PowerSupply

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Overall Loop Accuracy — IndicationOverall Loop Accuracy — Recording

1.96 (3)1.72 (3)

Reviewed by: +~Date: yg~>/gp

ATTACHMENT 3Rage 2 of 2

Containment Sum Level (narrow range) DataCont'd

Notes:

(2) Accuracy without LOCAAccuracy within 5 min after LOCA is 5%Accuracy after 5 min of LOCA is 10%,

(3) Overall accuracy within 5 minafter LOCA is: a. indication

b. recording

Overall accuracy after 5 minof LOCA is: a. indication

b. recording

NA — Not Applicable

5.13%5.05%

10.06%10. 02%

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ATTACHMENT 4 .

HYDROGEH ANALYZER SYSTEM DATA

IDENTIFICATION

Hydrogen Analyzer Comsip

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FLORIDA POWER 8 LIGHT COMPANY

INTER-OFFICE CORRESPONDENCE

TO

FROM

, R. E. Uhrig

J. W. Williams, Jr.

sUELIEOTr St. Lucie Unit 1

Post- TMI Requi rementsAdditional AccidentMonitoring Information

RECEIVED

MPV'I 'I'9&3

Nuclear LIcensuIgLOCATION

DATE

COPIES TO

Nuclear Energy

Hav 161983

D. K. JamesC. S. KentR. J. Acosta/910.13 SLH. S. RuffC. M. WethyJ. A. YespicaW. R. KleinP. K. GreenR EA-SLN-510P NS-L I-83-344-1/2

The subject information is attached for your review and forwarding to theNRC. The attachment was prepared in accordance with the requirements of0.2. f »«1~ ffThe information contained in the attachment to this letter was prepared byPower Plant Engineering.

Except for the following, the attachment is fully responsive to the NRC

requirements or differences are clearly noted in the attached: None.

J. W. Wil liams, Jr.

JWW/PKG/j s

Attachment

PEOPLE... SERVING PEOPLE Form 1008 {StooctredI Rev. 8/81