ML20077D288

Application for Amend to License NPF-12,changing Tech Specs Tables 4.6-1a,4.6-1b & 4.6-2 Re Containment Structural Integrity

ML20077D288
Person / Time
Site:	Summer
Issue date:	07/22/1983
From:	Dixon O SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20077D291	List: ML20077D288 ML20077D294
References
NUDOCS 8307260465
Download: ML20077D288 (2)

Text

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SOUTH CAROLINA ELECTRIC & GAS COMPANY POST OPPic. 764 COLuweiA. SOUTH CAROLINA 29218 O. W. DIXON. JR.

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July 22, 1983 NuCL.An Op.natlONS Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory ~ Commission Washington, D.C. 20555

Subject:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Containment Structural Integrity Technical Specification Tables 4.6-la, 4.6-lb and 4.6-2

Dear Mr. Denton:

South Carolina Electric and Gas Company (SCE&G) hereby requests a change to the Virgil C. Summer Nuclear Station Technical Specifications for Containment Structural Integrity, Tables 4.6-la, 4.6-lb and 4.6-2 (see attached). Table 4.6-la gives the surveillance tendons and lift-off forces for inspection periods 1, 2, and 3. Table 4.6-lb gives the adjacent tendons and gives lift-off forces for the three surveillance periods. Table 4.6-2 gives normalizing factors for each of these surveillance periods.

An error was discovered in the calculations for the predicted hoop teadon Base Values listed in Tables 4.6-la and 4.6-lb. The error caused the Base Value for each hoop tendon listed to be from 0 to.7 Kips too high. The corrected values are provided in the marked-up tables attached. .Because the values were too high in Tables 4.6-la and 4.6-lb, and therefore more conservative, previous' testing results are still acceptable. Additionally, because this change corrects an error in the Technical Specifications, the margin of safety is not reduced and the l

l probability or consequences of an nccident are not increased.

i Thus, a finding of no significant hazard is appropriate.

Four tendon surveillance substitutions have also been made.

Tendons D-219 (listed twice) and 36AC were changed because they l

were checked during the first surveillance conducted prior to l start-up. Tendon D-312 was changed because of a physical

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ho3 Oh5 PDR 8-(*JJ 4[ cdl.

Mr. Harold R. Denton July;22, 1983 Page 62 interference problem which makes inspection impossible.

Appropriate revisions to the adjacent tendons, corresponding base values and normalizing factors for the substituted.

tendons are shown in the attached tables also. SCE&G has

- determined that a finding of no significant hazard is appropriate for these tendon surveillance substitutions because selection of tendons for testing is random (see Technical Specification 4.6.1.6.1), and therefore, selection of other tendons does'not reduce a margin of safety or increase the probability or consequences of an accident.

These. changes have been reviewed and approved by the Plant Safety Review Committee and the Nuclear Safety Review Committee. A check in the amount of Four Thousand Dollars

($4000.00). is enclosed for processing this change.

I 'If you require additional information, please contact us.

very truly yours, f

1 .

O. W. xon, NEC:OND/fjc cc: V. C. Summer

! T. C. Nichols, Jr./O. W. Dixon, Jr.

E. H. Crews, Jr.

E. C.< Roberts-

.H. N. Cyrus l J. P. O'Reilly P

j. Group / General Managers O. S. Bradham R. B.-Clary C. A. Price l- A. R. Koon

! C. L.'Ligon (NSRC)

G. J. Braddick l 'J.1C. Miller l J..L.-Skolds i

-J. B. Knotts, Jr.

H. G. Shealy NPCF File (Lic./Eng.)

I i-

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