ML20055A004
| ML20055A004 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 06/22/1982 |
| From: | Dixon O SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-SSINS-6820 10CFR-050.55E, 10CFR-50.55E, IEB-81-01, IEB-81-1, NUDOCS 8207150374 | |
| Download: ML20055A004 (4) | |
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SOUTH CAROLIN A ELecTaicN UIA's(CQMPA s' 7, y ".;
n.r Cotuwaia. Souta Camot.Na 292 I O June 22,1'982* - 0 UN 29 Ajj), j y o w.o..o~.;-
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Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Comnission Region II, Suite 3100 101 Marietta Street, N. W.
Atlanta, Georgia 30303
Subject:
Virgil C. Sumer Nuclear Station Docket No. 50/395 IE Bulletin 81-01
Dear Mr. O'Reilly:
In accordance with Nuclear Regulatory Chanission Inspection and Enforce:ent Bulletin 81-01, the mechanical snubbers installed on safety related systens at the Virgil C. Sumner Nuclear Station have received a visual examination for damage and a manual test to verify freedon of movenent. As a result of our inspection program, several snubbers were found to be inoperable. On February 15, 1082, Mr. Virgil Brownlee of NBC Region II was notified of a ptential significant deficiency under the provisions of 10CFR50.55(e). Rather than evaluating the consecuences of each inoperable snubber, the condition is beirg declared a significe it deficiency, and South Carolina Electric & Gas Q2npany (SCE&G) is correcting the condition. Based on our discussions with Mr.
Brownlee,' this report ccnstitutes SCE&G's response to IEB 81-01 as well as our report for the significant deficiency.
Visual examinations were conducted according to Virgil C. Sumner Nuclear Station Surveillance Test Procedure STP-403.002. This test procedure required visual examination of snubber rings, dust cover, bolts, pins, end attachments, bearings, housings, etc. Manual testing of each snubber ms performed according to test procedure STP-403.003. '1his procedure required a manual psh-pull test in conpression arx1 tension to ensure freedon of movement.
Snubbers examined and tested as required by the bulletin were manufactured by Pacific Scientific. All safety related mechanical snubbers at Virgil C.
Sumer Nuclear Station are of this manufacturer. 'Ihere were 1,380 safety related snubbers tested under this program. The distribution according to size is as follows:
Model Size Quantity PSA-\\
257 PSA-h 148 PSA-1 335 PSA-3 331 PSA-10 1%
PSA-35 109 PSA-100 4
The ntsnber of failures, size, and location are listed in Attachment 1.
At this tine it is not totally apparent as to the cause of each snubber failure.
8207150374 820622 gDR ADOCK 05000 f
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Mr. James P. O'Reilly June 22, 1982 Page 2 The damaged snubbers are being returned to the manufacturer for repair and evaluation. The manufacturer will provide a report to SCI %G which will identify the trole of failure.
It is anticipated that this report will be available to us by August 20, 1982. We will provide a final report identifying cause and corrective action when this information is received.
Corrective action for inoperable snubbers has been to replace the snubber.
Corrective action for unstaked dust covers has been to stake the cover according to construction procedures. SCE&G has evaluated each frozen snubber for potential damage to the pipe and/or other supports as a result of Hot Functional Testing.
It has been determined that no damage has occurred.
If you require further information, please advise.
Ve y your O. W. Dixon d g
GIN:JWP:OWD:glb Attachment cc:
V. C. Strinner w/o att.
T. C. Nichols, Jr. w/o att.
G. J. Fischer w/o att.
O. W. Dixcn, Jr.
H. N. Cyrus H. T. Babb D. A. Natsnan M. B. Whitaker, Jr.
W. A. Williams, Jr.
O. S. Bradham R. B. Clary M. N. Browne A. R. Koon H. Radin Site OA J. Turkett C. L. Ligon (NSRC)
G. J. Braddick J. K. Skolds J. B. Knotts, Jr.
B. A. Bursey I&E (Washington)
Doctanent Managenent Branch (55e, 21, LER)
NPCF File
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Attactinent 1 James P. O'Reilly Docket No. 50/395 June 22, 1982 Page 1 of 2 NONCONFORMANCE PO.
SNUBBER K) DEL / SIZE IDAD(lb)
IOCATION FAILURE 484, Rev. O CSH-1262 PSA-1/4 350 AB-421 Frozen 484, Rev. O RHH-163 PSA-3 6,000 AB-378 Frozen 484, Rev. O MiH-202 PSA-1/2 650 IB-432 Frozen 484, Rev. O FWH-173 PSA-10 15,000 IB-450 Frozen 4M, Rev. O SPH-ll6 PSA-3 6,000 AB-404 Frozen 484, Rev. 1 RHH-038 PSA-1/4 350 AB-403 Frozen 484, Rev. 2 RCH-044 PSA-1 1,500 RB-482 Frozen 484, Rev. 2 CCH-121 PSA-3 6,000 AB-420 Frozen 484, Rev. 2 CSH-4009 PSA-1/4 350 RB-437 Frozen 484, Rev. 3 SIH-095 PSA-1/2 650 IB-422 Frozen 484, Rev. 3 SIH-415 PSA-35 50,000 RB-435 Frozen 484, Rev. 3 CSH-156 PSA-1/2 650 RB-424 Frozen 484, Rev. 4 CSH-4014 PSA-1/4 350 RB-433 Frozen 484, Rev. 4 CSH-765 PSA-1/2 650 RB-415 Frozen 4M, Rev. 4 CSH-957A PSA-1/4 350 AB-423 Frozen 528 BDH-018 PSA-1/2 650 RB-426 Frozen 528 BDH-42 PSA-1/2 650 RB426 Frozen 528 BDH-044 PSA-1/4 350 RB-425 Frozen 624 RHH-054 PSA-1/4 350 AB-404 Would Not Engage 642 SIH-1343 PSA-1/4 350 RB-422 Frozen
s James P. O'Reilly Docket No. 50/395 June 22,1%2 Page 2 of 2 NONWN MRMANCE NO.
SNUBBER EDEL/ SIZE IDAD(lb)
IDCATION FAIUJRE 642 ASH-079 PSA-1/4 350 AB-470 Frozen 642 RCH--4006 PSA-1 1,500 RB-435 Frozen 642
!EH-226 PSA-1/4 350 IB-425 Frozen 660 SIH-062 PSA-3 6,000 AB403 Frozen 6%
RHH-228 PSA-3 6,000 AB-415 Frozen
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659 OCH-773 PSA-10 15,000 IB-423 Unstaked 659 SIH-073 PSA-3 6,000 AB-422 Unstaked 697 RCH-121 PSA-3 6,000 RB-436 Unstakel 697 Sm-4010 PSA-3 6,000 AB-425 Unstaked 720 CSH-4020 PSA-1 1,500 AB-427 Unstakal t
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