ML20045G421

Nonproprietary TS Improvement Analysis for ECCS Actuation Instrumentation for Hope Creek Generating Station

ML20045G421
Person / Time
Site:	Hope Creek
Issue date:	10/31/1990
From:	Larson C, Raftery R, Rogers A GENERAL ELECTRIC CO.
To:
Shared Package
ML20045G418	List: ML20045G417 ML20045G421
References
RE-018, RE-018-R01, RE-18, RE-18-R1, NUDOCS 9307130328
Download: ML20045G421 (21)

Text

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GENERAL ELECTRIC COMPANY CLASSI J

RE-018 ORF A00 0255SE REV. 1, OCTOBER 1990 TECHNICAL SPECIFICATION IMPROVEMENT ANALYSIS FOR THE EMERGENCY CORE COOLING SYSTEM ACTUATION INSTRUMENTATION FOR HOPE CREEK GENERATING STATION (THIS REPORT HAS BEEN PREPARED FOR PUBLIC SERVICE ELECTRIC AND GAS THROUGH THE TECHNICAL SPECIFICATION IMPROVEMENT COMMITTEE OF THE BWR OWNERS' GROUP) v y

PREPARED BY:

@s R. P. Raftery, P incippl E ineer i

Reliability Engine ri S rvices VERIFIED BY:

C. L. Larson, Principal Engineer Reliability Engineering Services APPROVED BY:

A. E. Rogers, Manager l

Reliability Engineering Services l

9307130328 930702

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GENERAL ELECTRIC COMPANY CLASSI IMPORTANT NOTICE REGARDING CONTENTS OF THIS REPORT Please Read Carefully The only undertakings of General Electric Company respecting information in this document are contained in the contract between the purchasing customer and the General Electric Company as referenced in General Electric Proposals Number 355-1525, Revisions 1 and 2, and nothing contained in this document shall be construed as changing the contract.

The use of this information by anyone who has not contracted for its use for any purpose other than that for which it is intended, is not authorized; and with. respect to any authorized use, General Electric Company makes no representation or warranty, and assumes no liability as to the completeness, accuracy, or usefulness of the information contained in this document.

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GENERAL ELECTRIC COMPANY CLASSI TABLE OF CONTENTS Paae 1.

INTRODUCTION 1

2.

EVALUATION METHOD 2

3.

RESULTS OF ECCS EVALUATION 4

4.

SUMMARY

AND CONCLUSIONS 7

5.

REFERENCES 8

APPENDIX A: ECCS ACTUATION INSTRUMENTATION A-1 EVALUATION FOR THE HOPE CREEK GENERATING STATION l

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GENERAL ELECTRIC COMPANY

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CLASSI j

1.

INTRODUCTION ibis report extends the generic study of modifying the technical specification requirements of the emergency core cooling system (ECCS) on a plant specific basis for Hope Creek Generation Station (HCGS), a BWR 4.

The generic study (References 1 and 2) provides a technical basis to modify the surveillance test intervals and allowable out-of-service times of the ECCS actuation instrumentation from those of the generic technical specifications.

The generic study also provides additional analyses of various known different ECCS configurations to support the application of the generic basis on a plant specific basis.

The generic basis and the supporting analyses were utilized in this plant specific evaluation. The results of the plant specific evaluation for Hope Creek are presented herein.

GENERAL ELECTRIC COMPANY CLASSI 2.

EVALUATION METHOD The plant specific evaluation of the modification of the surveillance test frequencies and allowable out-of-service times of the ECCS actuation instrumentation was performed in the following steps:

a.

Gather plant specific information on the ECCS from Public Service Electric and Gas (PSE&G).

The information includes the following:

(1)

Piping and Instrumentation Diagrams (P& ids) of ECCS, reactor core isolation cooling (RCIC) system, emergency service water systems, and air systems to ADS valves.

(2)

Elementary Diagrams of the ECCS, RCIC, and related systems.

(3)

ECCS, RCIC and electric power distribution system descriptions such as those in the plant Final Safety Analysis Report (FSAR).

(4)

Technical specifications on the ECCS, RCIC, the suppression 7

l chamber, and the electrical systems.

(5)

Information on ECCS surveillance test procedures.

(6) Dependency matrices showing dependence of ECCS and RCIC systems on support systems and on actuation instrumentation.

(7) Available data on actuation instrumentation failures.

The latest revisions of the above items were supplied by PSE&G.

Section I of the checklist in Appendix A was used to identify the data source of the plant specific information.

b.

Construct the plant specific ECCS configuration from the plant specific information.

Sections "A" through "E" in Section II of the r

Appendix A checklist was used for this process, Compare the plant specific ECCS configuration with the generic ECCS c.

configuration using the generic ECCS fault trees, ECCS description, i

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GENERAL ELECTRIC COMPANY CLASSI technical specification requirements, and other generic inputs.

Section III of the checklist was used for this process, d.

Classify the differences in ECCS system design, in support systems, and in instrumentation, into three categories:

(1)

Differences which obviously have no negative effect on the reliability of the ECCS.

Examples of these "no effect" items are component name differences, symbol differences, and other minor non-functional differences.

Other effects not requiring analysis are those in which the specific plant has greater redundancy than the generic model. Disposition of the items with obviously no negative effect is done with "no analysis required".

(2)

Differences which require engineering judgment for disposition because of the functional differences.

Examples of these differences are the use of shared room cooling systems in a specific plant compared with individual room cooling systems in the generic plant.

The disposition of such items would require engineering assessment in a " simple study" as shown in Appendix F of Reference 2.

(3) Differences which require additional analyses to evaluate the effect on the ECCS reliability.

Examples of such differences are use of two diesel generators and two electrical systems in a specific plant compared with a larger number of diesel generators and electrical systems in the generic evaluation.

Disposition of these items would require additional analyses

(" Modify fault trees and perform analysis.") to compare with the generic results.

These analyses are documented in Reference 2.

Compile a list of plant specific differences of Categories (2) and e.

(3).

P GENERAL ELECTRIC COMPANY CLASSI f.

Assess the reliability effect of the differences identified in Steo (e) on the generic results. The results of the assessment are documented in Section III of the checklist, Appendix A.

g.

Document the results of the plant specific evaluation.

The above seven step process is documented in Appendix A of this report.

3.

RESULTS OF ECCS EVALVATION The results of the plant specific evaluation of the ECCS for HCGS are documented in Appendix A of this rept.rt.

The results show that the ECCS and support systems configuration of HCGS has two differences from the BWR 3/4 generic model* which are classified Category (3), and one which is in Category (2).

3.1 Detailed Analyses The HCGS differences in Category (3), requiring detailed analysis, are as follows:

i The generic model has four emergency service water loops, with loops a.

3 and 4 primarily providing cooling water to diesel generators 3 and 4.

The HCGS emergency service water system has two loops.

b.

The generic model has no ADS inhibit switch, HCGS uses an-AOS inhibit switch.

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The term " generic model" means the ECCS configuration used in the generic analysis.

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1 GENERAL ELECTRIC COMPANY CLASSI i

i 3.2 Simole Studies The HCGS difference in Category (2), requiring a simple study, is as follows:

Injection valves of the generic model are stroke tested quarterly,'

a those at HCGS are stroke tested at cold shutdown, which could be as long as 18 months.

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SUMMARY

AND CONCLUSIONS A plant specific evaluation of modifying the surveillance test intervals and allowable out-of service times of the ECCS from the technical specifications of HCGS has been performed. The evaluation utilized the plant specific information supplied by PSE&G and the generic basis and the additional analyses documented in References 1 and 2.

The results indicate that the ECCS configuration for HCGS is similar to the ECCS configuration in the generic evaluation, with three significant differences.

i The differences between HCGS and the generic model have been modeled by envelope cases 4A of Reference 2, plus one simple study, which show that the proposed changes to ECCS actuation instrumentation Technical Specifications would meet the 4% acceptance criterion in Reference 2.

Therefore, the generic basis in References 1 and 2 is applicable to HCGS.

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GENERAL ELECTRIC COMPANY CLASSI 5.

REFERENCES (1)

D. B. Atcheson, et al, "BWR Owners' Group Technical Specification Improvement Methodology (with Demonstration for BWR ECCS Actuation Instrumentation) Part 1," General Electric Company, NEDC-30936P-A-December,1988.

(2)

D. B. Atcheson, et al, "BWR Owners' Group Technical Specification Improvement Methodology (With Demonstration for BWR ECCS Actuation Instrumentation) Part 2," General Electric Company, NEDC 30936P-A, December, 1988.

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4 GENERAL ELECTRIC COMPANY CLASSI APPENDIX A ECCS ACTUATION INSTRUMENTATION EVALUATION FOR HOPE CREEK GENERATING STATION J

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4 GENERAL ELECTRIC COMPANY CLASSI Section 1 - ECCS Plant Specific Data Source Utility:

Public Service Electric and Gas Company Plant:

Hope Creek Generating Station Source Number 1.

ECCS and RCIC P&lDs 2.

Emergency Service Water P& ids 3.

Electrical Drawings 4.

Instrumentation Logic Diagrams 5.

ECCS Fault Trees 6.

Final Safety Analysis Report I

7.

Technical Specifications 8.

Other Drawings-9.

Dependency Matrices f

10.

Failure Data 11.

Test Procedure Questionnaire 12.

Telephone Call Records 13.

NEDC-30936P, Part 1 14.

PSE&G Comments on GE's Tech Spec Improvement Analysis for the ECCS Actuation Instrumentation for Hope Creek.

A-2 l

GENERAL ELECTRIC COMPANY CLASSI Section II - ECCS Configuration Data A.

ECCS System GENERIC Difference Data

• ESS BWR 3/4 (Y/N)

Source 1.

Number of:

Core Spray Pumps / Loops 4/2 4/2 N

1 LPCI Pumps 4

4 N

1 ADS Valves 5

5 N

1

- HPCI Pumps 1

1 N

1 2.

Needed for Success, Number of:

- Core Spray Pumps / Loops 2/1 2/1 N

6 LPCI Pumps 1

1 N

13 ADS Valves 2

2 N

13 3.

Number of:

- Diesel Generators 4

4 N

3,6 Electrical Divisions 4

4 N

3,6 4.

IC or RCIC RCIC RCIC N

1 5.

Loop Selection Logic N

N N

6 The numbers shown in the Data Source column refer to the documents listed in Section 1.

A-3 m

GENERAL ELECTRIC COMPANY CLASSI Section II - ECCS Configuration Data B.

SUPPOPT SYSTEM DEPENDENCIES The dependencies each front line ECCS system has on the listed support subsystems for the generic and specific plants are shown.

FRONT LINE SYSTEMS LPCI CORE SPRAY SUPPORT

---LOOPS

--LOOPS ADS ADS DIESELS SUBSYSTEMS A B C D A/C B/D B

D RCIC HPCI A B C D OFFSITE AC POWER X X X X X

X X

X S S S S ONSITE AC POWER DIVISION 1 X

G X

G G

G S

DIVISION 2 X

G X

G G

S G

O! VISION 3 G

X X

S S

G S

DIVISION 4 G

X X

S S

S G

ONSITE DC POWER DIVISION 1 X

G X

G G

S X

DIVISION 2 X

G X

X G

S G

X DIVISION 3 G

X X

G G

G S

X i

O! VISION 4 G

X X

X S

G X

SERVICE WATER EMERGENCY A X

X X

G S

S S

EMERGENCY B X

X X

5 G

X S

EMERGENCY C G

G l

EMERGENCY D G

l WATER SUPPLY SUPPRESSION POOL X X X X X

X X

X CONDENSATE TANK X

X SPRAY POND / RIVER X X X X AIR-CONTROL DIVISION 1 G

CONTROL DIVISION 2 G

1 CONTAINMENT INSTR. DIV 1 X

CONTAINMENT INSTR. OlV 2 X

ROOM COOLING LPCI X X X X CS X

X RCIC X

X HPCI X X X X l

DIESELS X = IN BOTH GENERIC AND' SPECIFIC BWR 3/4s G = ONLY IN GENERIC BWR 3/4 S = ONLY IN SPECIFIC BWR 3/4 A4

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GENERAL ELECTRIC COMPANY i

CLASSI Section 11 ECCS Configuration Data C.

INSTRUMENTATION DEPENDENCIES The dependencies each front line ECCS system has on the listed support subsystems for the generic and specific plants are shown.

FRONT LlHE SYSTEMS CORE SPRAY ADS ACTUATION

\\

---LPCI PUMPS-

--LOOPS-LOGIC INSTRUMENTATION

\\

A B

C D

A/C 8/D 8

0 RCIC HPCI RPV WATER LEVEL 1 (LOW LOW LOW) 69]A,E X

X G

6918,F X

X S

691L,G X

X G

6910,H X

X S

RPV WATER LEVEL 2 (LOW LOW)

X 692B,A.C.E,G X

692B F/6970,H RPV WATER LEVEL 3 (LOW)

X 6958,B X

6950,0 RPV WATER LEVEL 8 (HIGH)

X 6938,F/6980,H X

693A,C,E,G DRYWELL PRESSURE HIGH 694A,E X

X G

G S

694B,F X

X S

S G

694C,G X

X G

G S

6940,H X

X S

S G

X IN BOTH GENERIC AND SPECIFIC BWR 3/4s G = ONLY IN GENERIC BWR 3/4 5

ONLY IN SPECIFIC BWR 3/4 l

4 A-5

GENERAL ELECTRIC COMPANY CLASSI Section II - ECCS Configuration Data C.

INSTRUMENTATION DEPENDENCIES (Continued)

The dependencies each front line ECCS system has an the listed support subsystems for the generic and specific plants are shown.

FRONT LINE SYSTEMS CORE SPRAY ADS ACTUATION

\\

---LPCI PUMPS--

--LOOPS--

LOGIC INSTRUMENTATION

\\

A B

C 0

A/C 8/0 8

0 RCIC HPCI RPV PRESSURE LOW 690A,E G

X 6908,F G

X 690J,N G

X 690K,R G

X INJECTION VALVE Of.LTA P 658A G

B G

C G

D G

RPV LOW PRESSURE 658A S

B S

C S

D 5

LPCI PUMP DISCHARGE PRESSURE HIGH C55B,F; 6568,F X

X 6550,H; 6560,H CS PUMP DISCHARGE PRESSURE HIGH X

655B,F X

6550,H ADS DRYWELL PRESSURE BYPASS TIMER X

Kil4B,F X

Kll40,H X

X ADS TIMER MANUAL INITIATION SW X

X X

X X

X X

X X

X X = IN BOTH GENERIC AND SPECIFIC BWR 3/4s; G = ONLY IN GENERI,C BWR 3/4; S = ONLY IN SPECIFIC BWR 3/4 A-6 1

k GENERAL ELECTRIC COMPANY CLASSI Section II - ECCS Configuration Data

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l C.

INSTRUMENTATION DEPENDENCIES (Continued)

)

The dependencies each front line ECCS system has on the listed support l

subsystems for the generic and specific plants are shown.

l FRONT LINE SYSTEMS RELATED CORE SPRAY ADS NON-ACTUATION

\\

---LPCI PUMPS---

--LOOPS--

LOGIC INSTRUMENTATION

\\

A B

C 0

A/C B/D B

D RCIC HPCI LPCI PUMP DISCHARGE FLOW LOW A

X l

B X

C X

0 X

CS SYS DISCHARGE

{

FLOW LOW A

X B

X CST LEVEL LOW 661A,E G

X i

035A,E S

J SUPPRESSION POOL LEVEL HIGH X

X I

I ADS INHIBIT SWITCH B

S D

S HPCI PUMP DISCHARGE X

FLOW LOW HPCI TURBINE EXHAUST I

X PRESSURE HIGH (656B,F)

HPCI PUMP SUCTION X

PRESSURE LOW (653)

X = IN BOTH GENERIC AND SPECIFIC BWR 3/4s G - ONLY IN GENERIC BWR 3/4 l

5 - ONLY IN SPECIFIC BWR 3/4

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GENERAL ELECTRIC COMPANY CLASSI Section II - ECCS Configuration Data D.

Minimum Number of Sensors, Channels, or Components for Failure, HCGS.

A: - MINIMUM SENSOR FAILURES REQUIRED TO FAIL TRIP FUNCTION

• B: = MINIMUM NUMBER SENSOR FAILURES REQUIRED TO FAIL FUNCTION - TOTAL C:

MINIMUM NUMBER OF SENSOR TYPES REQUIRED TO FAIL FUNCTION DIFFERENT FROM GENERIC TRIP (Y/N)

FUNCTION A

B C

B C

CS PUMP 2 DRYWELL PRESSURE AND 4

2 N

N INITIATION 2 RPV LEVEL 1 (LOW LOW LOW)

CS INJ VALVE 2 RPV LOW PRESSURE PER LOOP 4

I N

N LPCI PUMP 2 DRYWELL PRESSURE AND 4

2 N

N INITIATION 2 RPV LEVEL 1 LPCI INJ VALVE 4 RPV LOW PRESSURE 4

1 N

N ADS INITIATION 2 RPV LEVEL 1 OR 2

I N

N 2 RPV LEVEL 3 (LOW)

ADS TIME DELAY 2 TIMERS 2

1 N

N HPCI 2 DRYWELL PRESSURE AND 4

2 N

N INITIATION 2 RPV LEVEL 2 (LOW LOW)

HPCI LEVEL 8 2 RPV LEVEL 8 (HIGH) 2 1

N N

HPCI INJ VALVE 2 DRYWELL PRESSURE AND 4

2 N

N 2 RPV LEVEL 2 HPCI WATER 2 CST LEVEL LOW 2

1 N

N SOURCE RCIC 2 RPV LEVEL 2 2

1 N

N INITIATION RCIC LEVEL 8 2 RPV LEVEL 8 2

I N

N RCIC WATER 2 CST LOW LEVEL TRANSFER 2

1 N

N i

SOURCE LOGIC RCIC INJ VALVE 2 RPV LEVEL 2 2

1 N

N Based on data sources 4 & 6.

A-8

GENERAL ELECTRIC COMPANY CLASSI Section II - ECCS Configuration Data E.

Surveillance Reauirements, ECCS Instrumentation and Related Subsystems

• SURVEILLANCE REQUIREMENTS **

DIFFERENCE GENERIC 3/4 HCGS (Y/N)

CORE SPRAY SYSTEM REACTOR WATER LEVEL 1 (LOW LOW LOW)

M M

N DRYWELL PRESSURE HIGH H

M N

REACTOR PRESSURE LOW M

M N

PUMP DISCHARGE FLOW - LOW (BYPASS)

N/A M

Y PUMP START TIME DELAY - NORMAL POWER N/A M

y PUMP START TIME DELAY - EMERGENCY POWER N/A M

Y MANUAL INITIATION R

R N

lEl REACTOR WATER LEVEL 1 M

M N

DRYWELL PRESSURE HIGH M

M N

REACTOR PRESSURE LOW H

H N

INJ. VALVE DIFFERENTIAL PRESSURE LOW M

N/A Y

PUMP DISCHARGE FLOW - LOW (BYPASS)

N/A M

Y PUMP START TIME DELAY - NORMAL POWER N/A M

Y MANUAL INITIATION R

R N

llEfd REACTOR WATER LEVEL 2 (LOW LOW)

M M

N DRYWELL PRESSURE HIGH H

M N

CST LEVEL LOW H

M N

SUPPRESSION P0OL LEVEL HIGH H

H N

REACTOR WATER LEVEL B (HIGH)

M M

N PUMP DISCHARGE FLOW - LOW (BYPASS)

N/A M

Y MANUAL INITIATION R

R N

AD_S REACTOR WATER LEVEL 1 M

M N

DRYWELL PRESSURE HIGH H

M N

ADS DRYWELL PRESSURE BYPASS TIMER H

M N

ADS TIMER H

H N

CORE SPRAY PUMP DISCHARGE PRESSURE M

M N

LPCI PUMP DISCHARGE PRESSURE M

M N

REACTOR WATER LEVEL 3 (LOW)

M M

N MANUAL INITIATION R

R N

ADS INHIBIT SWITCH N/A R

Y INJECTION VALVE STROKE TEST Q

CSD/Q Y

DIESEL GENERATOR H

H N

ELECTRIC EQWEB ESSENTIAL AC W

W N

ESSENTIAL DC W

W N

ESSENTIAL AC BUSSES W

W N

Based on Technical Specifications, and data sources No. 7, 12, and 14.

M - MONTHLY, W = WEEKLY, R REFUELING, Q - QUARTERLY, CSD - COLO SHUTDOWN A-9

GENERAL ELECTRIC COMPANY CLASSI Section III - ECCS Confiauration Differences Classification (Hope Creek Generating Station)

Plant Specific Classification (Justifi-BWR 3/4 Generic Hodel Difference cation if Insignificant)

A.

ECCS System No differences.

Differences B.

Support Systems Differences 1.

Emergency service ESW has 2 loops.

water has 4 loops.

2.

Each LPCI loop is Each LPCI loop has one supported by 2 source of onsite AC sources of onsite and onsite DC power.

AC power and onsite DC power.

3.

Each ADS channel Each ADS channel has has 3 sources of one source of onsite onsite DC power.

DC power.

C.

Instrumentation and Procedures Differences 1.

Injection valves Injection valve stroke are stroke tested tests performed at quarterly.

cold shutdown or quarterly for CS/LPCI.

2.

ADS does not have ADS uses inhibit an inhibit switch, switch, tested every refueling.

3.

LPCI injection LPCI injection valves valves rely on both use only RPV low RPV low pressure

pressure, and delta P at each valve.

4.

LPCS,LPCI,and HPCI LPCS, LPCI, and HPCI discharge flows -

discharge flows - low low, are not in are in Hope Creek j

generic tech spec.

tech spec.

5.

LPCS and LPCI pump LPCS and LPCI pump start time delays start time delays are not in generic in Hope Creek tech i

tech spec.

spec.

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