RC-97-0065, TS Change Request - TSP 97-04,to License NPF-12,adding Footnote to TS 3.8.1.1, AC Sources - Operating, to Allow One Time Extension of Allowed Outage Time from 72 H to 7 Days to Perform on-line Maint on EDG B During Cycle 11

TS Change Request - TSP 97-04,to License NPF-12,adding Footnote to TS 3.8.1.1, AC Sources - Operating, to Allow One Time Extension of Allowed Outage Time from 72 H to 7 Days to Perform on-line Maint on EDG B During Cycle 11

ML20140C051
Person / Time
Site:	Summer
Issue date:	03/26/1997
From:	Gabe Taylor SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Andrea Johnson NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20140C057	List: ML20140C064 RC-97-0065, TS Change Request - TSP 97-04,to License NPF-12,adding Footnote to TS 3.8.1.1, AC Sources - Operating, to Allow One Time Extension of Allowed Outage Time from 72 H to 7 Days to Perform on-line Maint on EDG B During Cycle 11
References
RC-97-0065, RC-97-65, NUDOCS 9704020059
Download: ML20140C051 (3)

Text

_ _ _ .

south Carolina Electric & G s Company Gary J. Taylor

, P.o. Box 88 Veo President Jenkinsville, sC 29065 Nucle Onerations (803) 345-4344

'SCE&G Me/ch 26,1997 esonas:carm RC-97-0065 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555 Attention: Mr. A. R. Johnson Gentlemen:

Subject:

VIRGIL C. SUMMER NUCLEAR STATION (VCSNS) l DOCKET NO. 50/395 l OPERATING LICENSE NO. NPF-12 TECHNICAL SPECIFICATION CHANGE REQUEST - TSP 970004 EDG B ONE TIME AOT EXTENSION d

South Carolina Electric & Gas Company (SCE&G), acting for itself and as agent for South Carolina Public Service Authority, hereby requests an amendment to the Virgil C.

Summer Nuclear Station (VCSNS) Technical Specifications (TS). This request is being i submitted pursuant to 10 CFR 50.90.

The proposed change adds a footnote to TS 3.8.1.1, "AC Sources - Operating," to allow a one time extension of the allowed outage time from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 7 days to perform on-line maintenance on Emergency Diesel Generator (EDG) B during Cycle 11.

Emergency Diesel Generator B intercooler/ injector cooling water, jacket water, and lube 1

oil heat exchangers may need to be replaced next cycle. This work is expected to take longer than the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> allowed outage time in the current Technical Specification.

Results of eddy current testing on the EDG A jacket water heat exchanger during Refuel 8 indicated minimal tube degradation. Results of eddy current testing on the EDG A intercooler/ injector cooling and lube oil heat exchangers during Refuel 9 i identified further tube degradation. Based on the results from eddy current testing on EDG A during Refuel 9, SCE&G determined it would be prudent to replace the EDG A i heat exchangers during Refuel 10. Evaluations will be performed on the removed EDG A heat exchangers to further correlate the tube degradation mechanism and evaluate the impact on the EDG B heat exchangers. Previous eddy current testing on EDG B heat exchangers indicated minimal tube degradation. If needed, the EDG B heat exchangers will be replaced during Cycle 11.

Deterministic and probabilistic analyses have concluded that this change will not pose a significant increase in risk to the health and safety of the general public.

Please note the Refuel 10 outage duration is not affected by performing EDG B maintenance on-line or off-line. Performing EDG B maintenance on-line does, gf

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Document Control Desk l TSP 970004 l , ,RC-97-0065 Page 2 of 3 a

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however, improve EDG availability during Refuel 10 which is critical during refueling outage conditions.

The TS change request (TSCR) is contained in the following attachments:

! Attachment i Explanation of Changes Summary

Marked-up Technical Specification Page Revised Technical Specification Page -

t Attachment ll Safety Evaluation Attachment lil No Significant Hazards Evaluation SCE&G requests NRC review and approval of this amendment request prior to the tenth refueling outage which is scheduled to begin October 4,1997.

This proposed amendment has been reviewed and approved by the Plant Safety Review Committee and the Nuclear Safety Review Committee.  ;

These statements and matters set forth herein are true and correct to the best of my knowledge, information, and belief.

Should you have questions, please call Mr. Jim Proper at (803) 345-4088.

Very truly yours, i

Gery J. ylor CDX3JT/dr Attachments (3) c: J. L. Skolds W. F. Conway R. R. Mahan (w/o Attachments)

R. J. White L. A. Reyes NRC Resident inspector J. B. Knotts Jr.

M. K. Batavia K. R. Jackson DMS RTS (TSP 970004)

File (813.20)

NUCLEAR EXCELLENCE - A SUMMER TRADITIONI  ;

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Docum:nt Control Desk

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TSP 970004

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tl i l i STATE OF SOUTH CAROLINA :

l i  : TO WIT : I COUNTY OF FAIRFIELD -

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I hereby certify that on the 2 /, day of # del 19 77. before me, the subscriber, a Notary Public of the State of South Carolina, personally appeared Gary J.

Taylor, being duly sworn, and states that he is Vice President, Nuclear Operations of

the South Carolina Electric & Gas Company, a corporation of the State of South d

Carolina, that he provides the foregoing response for the purposes thorein set forth, that the statements made are true and correct to the best of his knowledge, information, and belief, and that he was authorized to provide the response on behalf of said Corporation. , j WITNESS my Hand and Notarial Seal M-No(a/y Public j Mf Commission Expires  !"/ ""

C ^"'~1cn Egi:cs My G. M Date A

NUCLEAR EXCELLENCE - A SUMMER TRADITION!