ML20198H707
| ML20198H707 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 01/09/1998 |
| From: | Nunn D SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20198H713 | List: |
| References | |
| NUDOCS 9801130378 | |
| Download: ML20198H707 (3) | |
Text
J* MHJfHlkN(Alli04NM EDISON Vre President i
Aa iDisoN I%n nAtto%Al cep.ur January 9, 1998 U. S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C.
20555 Gentlemen:
Subject:
Docket Nos. 50 361 and 50 362 Amendment Application Nos. 150 and 134, Supplement !
Extension of Emergency Diesel Generator Completion Time San Onofre Nuclear Generating Station Units 2 and 3
References:
1.
November 2, 1995 letter from Richard M. Rosenblum (SCE) to Document Control Desk (NRC),
Subject:
Amendment Application Nos. 150 and 134, Extension of Emergency Diesel Generator Allowed Outage Tiine, San Onofre Nuclear Generating Station, Units 2 and 3 2.
CE0G CE NPSD 996, " Joint Aplications for Emergency Diesel Generators A0T Extension," Kay 1995 3.
December 31, 1996 letter from J. L. Rainsberry (SCE)16 kV to Document Control Desk (NRC),
Subject:
Inter-Unit 4.
Bus Cross-Tie, San Onofre Nuclear Generating Station, Units 2 ond 3 Enclosed is Supplement I to Amendment Application Nos. 150 and 134 to facility OperatingLicensesNPF-10andNPF-15fortheSanOnofreNuclearGenerating Station gSiNGS) Units 2 and 3, respectively. These amendment applications concist of Proposed Change Number (PCN)-453, Supplement 1.
'The original PCN-453 proposed to modify Technical Specification (TS) 3.8.1 to discovory of failure.to meet LC0"pletion Time
- 1) extend the Offsite Circuit Com from "72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> E 6 days from to "72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> E 10 days from discovery of failure to meet LC0" and 2) extend the Emergency Diesel Generator (EDG)
Comgletion Time ~ from "72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> E 6 days from discovery of failure-to meet LCO to'"14 days E 17 days from discovery of failure to meet LCO."
Additionally, the originel PCN 453 proposed to further extend the EDG
. Completion Time to "10 days E 10 days from discovery of failure to meet LC0" l'
- ca a once-per-refueling cycle frequency for maintenance purposes.
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9901130378 990109
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PDR ADOCK 05000361
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Document Control Desk 2-i Supplement I to PCN 453 is being submitted to make three changes from-the original submittal.' 1hese changes are:
1)
To further extend the proposed Offsite Circuit Completion Time from "72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> AND 6 days from discovery of failure to meet LC0" to "72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 6h0 17 days from discovery of failure to meet LC0" i'
and extend the proposed Emergency Diesel Generator (EDG)
Completion Time-from "72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 6HQ 6 days from discovery of i
failure to meet LC0" to "14 days 6HD 17 days from discovery of failureEto meet LCO."
l 1
These increases in the proposed Completion Times are supported by SONGS-specific Probabilistic Risk Assessment figures that allow greater flexibility than those figures submitted in Reference 1.
The data presented in this Supplement I reflect the high degree of reliability of the SONGS AC power systems.. This reliability is due in part to the installation of the Inter Unit 4.16 kV Bus Cross Tie. Approval for use of this Cross-Tie was requested in Reference 3.
2)
To withdraw the request to allow a once per refueling cycle EDG Completion Time of "10 days Aug 10 days from discovery of failure to meet LCO." This request is no longer necessary in light of the increase in the proposed EDG Completion Time in item 1) above.
3)
To add a new TS 5.5.2.14. " Configuration Risk Management Program."
The purpose of the Configuration Risk Management Program (CRMP) is to ensure that a proceduralized Probabilistic Risk Assessment-informed process is in place that assesses the overall impact of plant maintenance on plant risk.
Implement &cion of the CRMP will enable appropriate actions to be taken or decisions to be made to minimir.e and control risk when performing on line maintenance for Systems, Structures, and Components with a risk informed Completion Time, is 5.5.2.14 will be applicable to TS 3.8.1 because the Completion Times for TS 3.8.1 are " risk informed Completion Times."
This license amendment application is based on a collaborative effort by participating Combustion Engineering Owners Group (CE0G) members based on an integrated review and asses ment of-plant operations, deterministic and design basis considerations, and plant risk. The above reference, which was submitted to the NRC staff for review and approval under separate cover, provides the basis for the methodology used in en augmented analysis to assess the impact of extending the current EDG Completion Time to 14 days in support of this troposed change.
Southern California Edison (SCE) requests this amendment be issued effective
+
- as of its date of issuance and be implemented within 30 days from the date of issuance.
This will provide adequate time for-the necessary procedure changes and training on the new Technical. Specifications.
SCE requests the NRC audit the Configuration Risk Management Program prior to approval and-implementation of TS 5.5.2.14.
i
_,. ~ _ _ _. - _ _
9 Document Control Desk If you would like additional information on this Technical Specification change request, please let me know.
Sincerely,
[R$1 pen,453 Enclosures K. E. Perkins, Jr.,gional Administrator, NRC Region IV E. W. Herschoff, Re cc:
Director Walnut Creek field Office, NRC Region IV I
J. A. Sloan, NRC Senior Resident inspector, San Gnofre Units ; & 3 H. B. Fields, NRC Project Manager, San Onofre Units 2 and 3 S. Y. Hsu, Department of Health Services, Radiologic Health Branch bec:
(See attached sheet)