ML20138G474

Safety Evaluation:Simplification of Test 23A,MSIV Functional Test

ML20138G474
Person / Time
Site:	Hope Creek
Issue date:	10/15/1985
From:	Public Service Enterprise Group
To:
Shared Package
ML20138G467	List: ML20138G463 ML20138G468 ML20138G474 ML20138G479 ML20138G487 ML20138G493 ML20138G497 ML20138G505 ML20138G513
References
PSE-SE-Z-015, PSE-SE-Z-15, NUDOCS 8510250483
Download: ML20138G474 (5)

Text

.

/; .

PUBLIC SERVICE ELECTRIC AND GAS COMPANY HOPE CREEK PROJECT SAFETY EVALUATION No. PSE-SE-Z-015 TITLE: SIMPLIFICATION OF TEST NUMBER 23A, MSIV FUNCTIONAL TEST Date: OCT 151985 1.0 PUR POS E The purpose of this Safety Evaluation is to document the results of an evaluation performed to ensure that the deletion of testing to determine the maximum power level for MSIV individual closure surveillance testing will not adversely af fect any safety systems or the safe operation of the plant.

2.0 SCOPE The scope of this safety evaluation is the adequacy of the power ascension test program with regard to MSIV testing.

REFERENCES

1. Regulatory Guide 1.68, Revision 2, August 1978

2. General Electric Startup Test Specification, 23A4137, Revision 0

3. Hope Creek Generating Station Draft Technical Specifications

4. Hope Creek Final Safety Analysis Report (FSAR)

Chapter 14

5. Hope Creek Generating Station Surveillance Procedure OP-IS.AB-102(O), Revision 0, Main Steam Valves Cold Shutdown Inservice Test 4.0 DISCUSSION Regulatory Guide 1.68 (Revision 2, August 1978), Appendix A, paragraphs 4.1 and 5.u require demonstration of the operability of the main steam isolation valves (MSIVs).

Test Number 23A, MSIV Functional Test, is currently planned to be performed, at the conditions specified in Hope Creek's FSAR Table 14.2-5. The MSIV functional PSE-SE-Z-015 1 of 3 8510250483 85 354 PDR ADOCK O PDR A

j%, ~.'

tests determine the functional performance and individual fast closure time of each MSIV at hestup and between Test Conditions 1 and 3. Test Number 23A also determines the maximum power level at which full individual closure can be performed while maintaining an adequate margin to scram and full isolation. It is proposed that the testing of the MSIVs to determine the maximum power level for subsequent surveillance testing be deleted.

The plant Technical Specifications define the requirements for demonstrating MSIV response times and operability. These specifications require response time and operability verification for each MSIV at a surveillance interval set forth in Section XI of the ASME Boiler and Pressure Vessel Code. Hope Creek surveillance procedure OP-IS.AB-102(O), Main Steam Valves Cold Shutdown Inservice Test (reference 5) specifies that MSIV full-closure tests be performed with the reactor in the cold shutdown condition. Therefore, testing to determine the maximum power level for full-closure tests of the MSIVs is not required.

5.0 CONCLUSION

Testing of the MSIVs at Test Condition Heatup and between Test Conditions 1 and 3 in accordance with power ascension test procedures demonstrates compliance with Regulatory Guide 1.68, Appendix A, paragraphs 4.1 and 5.u. A search

• for the maximum power level for future surveillance testing is not required since full-closure surveillance testing of the MSIVs will be performed at cold conditions. The proposed change will not adversely affect any safety systems or the safe operation of the plant, and therefore, does not involve an unreviewed safety question. No Technical Specifications change is required.

6.0 DOCUMENTS GENERATED None 7.0 RECOMMENDATIONS The FSAR and Startup Test Procedures shall be revised to reflect the proposed simplification to the MSIV functional tests as discussed above.

PSE-SE-Z-015 2 of 3

7-

,/

.s< ,

9 8.0 ATTACHMENTS None 9.0 SIGNATURES Originat # ,, _, S Verifier < f / f sq Group Head ///

(or SSE)_b ( ,b

'Da t'e

1. //d7 Systems Analysis Group Head bi( . (L T [.b. o Idsp Site. Engineering Manager M/[f A 3

/Da te s

t PSE-SE-Z-015 3 of 3 l

[* GENERAL ELECTRIC COMPANY TECHNICAL ANALYSIS HOPE CREEK GENERATING STATION

' TEST NUMBER 23A - MSIV FUNCTIONAL TESTS TEST SIMPLIFICATION - REDUCED NUMBER OF TESTS OBJECTIVE:

Regulatory Guide 1.68 (Revision 2, August 1978), Appendix A, paragraphs 4.1 and 5.u require demonstration of the operability of the main steam isolation valves (MSIVs). Also, these paragraphs require the demonstration of stroke times at rated temperature and pressure conditions and the response times during power ascension testing for the MSIVs. Tes t Numbe r 23A, MSIV Functional Tests, c'etermines the functional performance and individual fast clocere time of each MSIV at heatup and between Test Conditions I and 3. The maximum power level at which full individual closure ca. be performed without scram is determined by closing the f astest MSIV at Test Condition 2 or 3, then again at Test Condition 3 or 5, the latter test point being determined from extrapolation from the first test data.

Further extrapolation of the higher power test data determines the maximum power where all subsequent surveillance testing will be performed. It is proposed that testing of the MSIVs to determine the maximum power for subsequent tests be deleted.

DISCUSSION:

The response of the reactor and its associated systems is determined during the MSIV functional tests by analyzing test data and comparing the results to acceptance criteria, level 1 and level 2, which define the required system performance.

Level l criteria require that closure and delay times for each MSIV be within specified limits.

that The level 2 criteria require the reactor closures, shall and that peak not scram values fororsystem isolatevariables on individual MSIV (neutron flux, heat flux, vessel pressure, and steam flow) do not exceed prescribed limits.

The proposed test change deletes determining the maximum power condition for MSIV functional testing. Future tests of the MSIVs to satisfy plant Technical Specifications requirements will be done at cold shutdown conditions. Therefore, the testing to determine the maximum power level for subsequent testing is not required.

Testing of the MSIVs at heatup and between Test Conditions 1 and 3 demonstrates compliance with Regulatory Guide 1.68, Appendix A, paragraphs 4.1 and 4.u.

1

\

s l

L.

CONCLUSION:

Compliance with testing criteria at heatup and between Test Conditions 1 and 3 will satisfy the objectives of Regulatory Guide 1.68, Appendix A, paragraphs 4.1 and 5.u. The proposed change will not affect any safety systems or the safe operation of the plant, and therefore, does not involve an unreviewed safety question. Deleting the search for the maximum power level for testing is not required since the MSIVs will be tested at cold shutdown conditions in the future.

2