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V&V OF SAMG

AT

DUKOVANY NPP

12-14 December 2016Vienna IAEA

Miroslav Trnka

OVERVIEW

• General

• History of EOP and SAMG

• Validation

• Drill

1

CZECH REPUBLIC

� NPP Temelín

2 Units VVER 1000/V320

� Unit 1 - 2002 � Unit 2 - 2003� Installed capacity 2 x 1059 MWe� 14 - 15 GWh production per year

� NPP Dukovany

4 Units VVER 440/V213

� Unit 1 - 1985 � Unit 2 - 1986� Unit 3 - 1986� Unit 4 – 1987� Installed capacity 4 x 500 MWe� 15 - 16 GWh production per year

HISTORY OF EOPS AND SAMG

1993 begin development of EOPs, Westinghouse philosophy,

1999 implementation of EOPs

2001 begin development of SAMGs

2003 implementation of SAMGs

2010 upgrade SAMG – shutdown mode and Spend Fuel Pool

2013 begin development of DAM Program (FLEX)

2015 begin development of EDMG

2016-2017 Upgrade of SAMG

3

EDUCATION OF SA

Four groups of knowledge levels :

A) – members of TSC, shift supervisor, safety engineer and head of ERC

B) – CR crew, radiological in ERC and TSC

C)- members of ERC

D)- others

Basic educationTheory + SAMG A-16/ B -8/ C-2/- hours

Periodic (every year) A -5 /B-2 / C-1/- hours

4

EDUCATION OF SA

SAMG:

TSC + CR crew + Shift supervisor + safety engineer

Phenomenology: melting fuel, hydrogen, cooling in vessel, melt through RPV + visualization by SW ATLAS

Coordination drills:TSC members in shelter and CR crew on simulator 4 hour × 2 per year

Exercise by Plant plan

Shift are drill on usage mobile and portable devices

5

VALIDATION SAMG

Analyses

• verification of the proposed strategy• Changes and modifications of strategy

• Melcor• Astec

• Description of phenomenology• Time windows

6

In Vessel Retention, LOCA 200 mm

[K]

[K]

0.952 hod.

48.000 hod.6.690 hod.3.078 hod.

2.286 hod.1.397 hod.

[K]

[K]

0.952 hour

48.000 hour6.690 hour3.078 hour

2.286 hour1.397 hour

[K]

[K]

0.952 hod.

48.000 hod.6.690 hod.3.078 hod.

2.286 hod.1.397 hod.

[K]

[K]

0.952 hour

48.000 hour6.690 hour3.078 hour

2.286 hour1.397 hour

Capacity of new PARs

LOCA 200 mm bez TQ: Celková bilancia vodíku pri LOCA 200 mm

Obr. 2.11. Hmotnosti vodíka.

0.

50.

100.

150.

200.

250.

300.

350.

400.

450.

0 2 4 6 8 10 12 14 16 18 20 22 24

Čas [h]

Hm

otn

osť

[kg

]

celková vyrobená

zachytená v PO

zachytená v HZ

zrekombinovaná

uniknutá do okolia

EDU: LOCA 200 mm na SV so zaplavením ŠR a drenážou žľabov, scenár 2 ASTEC V 1.3 rev. 2

SAMG - VALIDATION

Full scope simulator:

EOPs – transitions to SAMG

The First hours in SA• SACRG –

• start IVR (flooding of RPV, depressurissation of I.O• Level in SGs• Isolation of CNTM• Electric power• Habitability of CR

9

IN VESSEL RETENTION

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DAM PROCEDURE

11 procedures , short, single-instruction on the use of mobile and portable devices to fulfill some functions, sometimes several variations.

Usage in SAMGs, EOPs (blackout), SD EOPs, EDMG

Issue from 2014, This is necessary to drill shift and fire brigade

Examples:

• Feeding SGs by mobile pump (from 2005)• Makeup RCS using pump powered by mobile DG• Loss of vital instrumentation or control power• SFP makeup• Isolation of Hydroaccumulators

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1212

KEY PARAMETERS MEASUREMENT

Portable I&C Devices

� SAMG entry parameters

� Measurement from transmitter or on line to Control Room

� Measurement in voltage or current transform to real value of parameter

�Not measured in breach of the sensor or routes between sensor and transmitter

DAM – FEEDING OF SG (AND SFP)

13

Fire brigade mobile pump – 7 pc (2 pumps

portable)

EMERGENCY PREPAREDNESS

• Fuel tank truck for refilling to SBO diesel and gasoline to small power generators –

Volume (15 m3 + 2 m3)

• Hose truck with pump 6 m3 / minute for long-distance transport of water up to 2.6 km - 1 pc

Another pump 6 m3 / min at a trailer for water- supply 1 piece

ALTERNATIVE FEEDING OF RCS, CTNM, SFP

� Injection after loss of cooling into RPV, SFP or spray system using Fire brigade pump

�Valves and quick operated valves is possible to open/close by portable devices

�New procedure for using these devices� Injection using T-joints – is necessary to cut piping� Injection using flange – dismantling, without cutting

Objímka

T-JOINT

PLACE TO CUTTING

FLANGE

PLACE FOR FLANGE – AIR PIPING

USAGE OF FLANGE

PORTABLE DRIVER

21

CONTROL QOV BY PORTABLE DRIVER-

CONNECTION

22

MOBIL DG

�4 × 320 kW (+ 4 cable cars)

�Supply one division of battery section (valves, I&C

measurement, PAMS)

+ one pump directly about 70 kW

POSSIBILITY TO SUPPLY PUMP IN CONTROL

ZONE

Emergency exit/entry doors

STAGING OF MOBILE DG DURING OPERATION

Staging of mobile DG

CONCLUSION.

1. Aanalyses depends on the model

2. Full Scope Simulator has its technical limits

and because after the start of SA is probably feasible only support activities on the place (because of possible non habitability in CR)

3. We place great emphasis on drills

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END

Do not forget that preventionis more important than repression

Question ?

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