ML20215N139
| ML20215N139 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/23/1986 |
| From: | Nauman D SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8611040346 | |
| Download: ML20215N139 (3) | |
Text
W6 gth cagna Electric #2 Gas Company Dan Nu n Co m a 29218 Nuclear Operations SCE&G ASCAnU,ijrt vy October 23,1986 ua 0CT30 A 9: 43 Dr. J. Nelson Grace Regional Administrator U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, NW Atlanta,GA 30323
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Response to Notice ofViolation NRC Inspection Report 86-15
Dear Dr. Grace:
On Se ptember 23,1986, the Nuclear Regulatory Commission (Region II) issued a Notice of Vio: ation for alleged violation of NRC requirements by South Carolina Electric & Gas Company's (SCE&G) Virgil C. Summer Nuclear Station. SCE&G has thoroughly reviewed and investigated the incidents described in the notice and pursuant to 10CFR2.201,is responding to the alleged violation in the enclosed Attachment L The Licensee is in basic agreement with the facts set forth in the Notice of Violation with the exception of the July 18,1986, implementation date. Actual use of Special Instruction 86-16 did not occur until July 25,1986. The Licensee has addressed in Attachment I the specific corrective action intended to prevent recurrence.
If there are any further questions or comments, please contact SCE&G at your earliest convenience The undersigned affirms that the statements and matters set forth in this letter and its attachment are true and correct to the best of my knowledge, information, and belief.
ry kuh yours, 8611040346 061023 PDR ADOCK 05000395 0
. A. Naun an WRII: DAN:bjh c:
O. W. Dixon, Jr./r C. Nichols, Jr.
K. E. Nodland E. IL Crews, Jr.
R. A. Stough E. C. Roberts G. O. Percival O. S. Bradham R. L. Prevatte D. R. Moore J. B. Enotts, Jr.
J. G. Connelly, Jr.
S. D. Hogge W. A. Williams, Jr.
IkE Washington Group Managers Document Management Branch W.R.Haehr INPO Record Center C. A. Price ANI Library W. T. Frady NPCF C. L. Ligon (NSRC)
File R. M. Campbell, Jr.
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- o ATTACIIMENTI RESPONSE TO NOTICE OF VIOLATION VIOLATION NO 50-395/86-15 L
ADMISSION OR DENIAL OF THE ALLEGED VIOLATION South Carolina Electric & Gas Company (SCE&G) is in agreement with the alleged violation.
4 II.
REASON FORTHE VIOLATION On July 14,1986, normal offsite power to the "A" Train Engineered Safety Features (ESF) Bus was lost. The loss of the 115KV offsite service occurred due to a fault during maintenance activities.
Due to the recent loss of power to the "A" Train ESF Bus, prior loss due to electrical storms, and the recent frequent occurrence of electrical storms in the area Special Instruction 86-16 (SI 86-16) was issued on July 16,1986. SI 86-16 was issued to provide guidance to the Operating Group concerning the use of the Emergency Diesel Generator (EDG) to maintain power to the ESF Bus whenever offsite power is in jeopardy.
On July 24,1986 normal offsite power to the "A" Train ESF Bus was again lost. The loss of the 115KV offsite service occurred due to lightning strike that toolc place during a severe thunder storm.
On July 25,1986, during a severe thunderstorm,it was believed that the loss of the 115KV offsite service to the "A" Train ESF Bus was imminent.
Because of this perceived threat to the 115KV offsite service and the possible resultant ESF actuation, SI 86-16 was implemented. For a proximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and 45 minutes the "A" Train ESF Bus was powered b the "A" Train EDG and isolated from the 115KV offsite service.
Special Instructions are primarily used to establish the Operating Group standard operating policy with references to the applicable procedures for actualimplementation and therefore a 50.59 screening is not required. SI 86-16 did not reference any procedures because it was generally understood that the Operating Group personnel were both familiar with the procedure 1
1 and the methodology for performing the evolution. However, the implementing procedure, STP-125.004 was only intended for Modes 5 and 6 and did not receive 50.59 screening for Modes other than 5 and 6.
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III.
- CORRECTIVE STEPS TAKEN AND RESULTS ACHIEVED SI 86-16 was canceled and an after the fact 50.59 engineering review was conducted. Considering the, plant configuration at the time SI 86-16 was 4
implemented, the 50.59 enpneering review determined that there were no safety concerns. The remaining SpecialInstructions have been reviewed to ensure that the referenced procedures have received the 50.59 screening required for the circumstances covered by the SpecialInstructions.
IV.
CORRECTIVE ACTION TAKEN TO AVOID FURTHER VIOLATION Station Administrative Procedure, SAP-204, will be revised to require that Special Instructions that are intended to provide guidance to operators outside that of normal routine or procedures be screened for 50.59 concerns..
Ifit has been determined that a 50.59 review is required, either an existing l
procedure will be revised or a new procedure will be generated to implement the SpecialInstruction. The new or revised procedure will then undergo the 50.59 review per Station Administrative Procedure, SAP-139.
V.
DATE OF FULL COMPLIANCE SCE&G expects to be in full compliance with respect to the corrective actions stated above by December 31,1986.
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