ML20214P533

Application for Amend to License NPF-12,revising Tech Spec Section 3.6.1.6, Containment Structural Integrity, to Change Sample of Tendons to Be Tested,Delete Listed Tables & Revise Min Required Average Tendon Force.Fee Paid

ML20214P533
Person / Time
Site:	Summer
Issue date:	09/16/1986
From:	Nauman D SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20214P535	List: ML20214P533 ML20214P537
References
NUDOCS 8609230215
Download: ML20214P533 (2)

Text

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• South Carolina Electric & Gas Company Den A. Nauman P.O. Box 764 Vice Preside .t u b. 29218 Nuclear Operations

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September 16,1986

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Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington,DC 20555

SUBJECT:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12

" Containment StructualIntegrity" Surveillance Requirement

Dear Mr. Denton:

This proposed change is to the Surveillance Requirements of Section 3.6.1.6, "Contamment Structural Integrity". The change, as shown in Attachment 1, revises the number and the representative sample of tendons to be tested, deletes Tables 4.6-1a,4.6-1b and 4.6-2, and revises the minimum required average tendon force for each group of tendons.

The proposed change involves a revision of the tendon testing program for the reactor containment building. It specifies the testing program to be used in the future for containment tendons and will adequately verify the ability of the tendons to perform their design function. The testing program will continue to provide assurance of the integrity of the containment post-tensioning system and will provide for warning and appropriate actions if " abnormal degradation" should develop.

The change is being generated due to the following:

t l e The present Technical Specifications requires that the tendon testing l program be specified after the 3rd surveillance for the remainder of plant operation. SCE&G completed the third surveillance in December of 1985.

e The acceptance criteria in the present Technical Specifications has been determined to be conservatively hi for required minimum average tendon force. Reference January 17,1985, Special Report 85-021) submittal from D. A. Nauman to Dr. J. Nelson Grace e The tables in the existing Technical S secifications cause many problems due to their specific nature and are consic ered unnecessary.

The proposed Technical Specification revision identifies the appropriate surveillance intervals and number of tendons to be examined for all subsequent surveillances. Specific tendons have purposely not been included in tables in the proposed Technical Specification revision and will instead be identified in station surveillance factors for eachprocedures.

specific tendon Additionally,dentified will be i in the station procedures andacce.

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DR ADOCK 05000395 Nf .d- 7]i3eIY PDR s

Mr. Harold R. Denton Containment StructuralIntegrity

. Page 2 September 16,1986 not in the Technical Specifications. This format will eliminate the need for further Technical Specification changes in the event a tendon has to be substituted at inspection time due to an unforeseen interference which may have developed.

The acceptance criteria has been revised for minimum average required tendon forces to reflect the design conditions. Calculations performed subsequent to original plant licensing b,y SCE&G's architectural engineer, Gilbert Commonwealth, have determined that the present Technical Specification limits are excessively conservative. Therefore, these calculations have been utilized to support the proposed revised minimum average tendon forces.

Attachment ll to this letter is SCE&G's "No Significant Hazards Determination."

This change has been reviewed and approved by both the Plant Safety Review Committee and the Nuclear Safety Review Committee.

Please find enclosed the application fee of $150.00 required by 10CFR170.

The statements and matters set forth in this submittal are true and correct to the best of my knowledge,information and belief.

If you should have any questions, please advice.

e truly yErs, 1

\>'D. .Naumon@%

RJB: DAN /bh Enclosures pc: O. W. Dixon, Jr/T. C. Nichols, J r. C. L. Ligon (NSRC)

E. H. Crews, Jr. R. M. Campbell, Jr.

E. C. Roberts K. E. Nodland O. S. Bradham R. A. Stough D. R. Moore G. O. Percival J. G. Connelly, Jr. R. L. Prevatte W. A. Williams, Jr. J. B. Knotts, Jr.

J. Nelson Grace H. G. Shealy Group Managers NPCF

W. R. Baeh r File j C. A. Price 1

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