ML13324A629
| ML13324A629 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/29/1985 |
| From: | Medford M Southern California Edison Co |
| To: | Zwolinski J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8505020200 | |
| Download: ML13324A629 (1) | |
Text
Southern California Edison Company P. 0.
BOX 800 2244 WALNUT GROVE AVENUE ROSEMEAD.
CALIFORNIA 91770 M.O.MEDFORD TELEPHONE MANAGER, NUCLEAR LICENSING (818) 302-1749 April 29, 1985 Director, Office of Nuclear Reactor Regulation Attention: Mr. J. A. Zwolinski, Chief Operating Reactors Branch No. 5 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Gentlemen:
Subject:
Docket 50-206 Containment Leak Testing - Appendix 3 Requirements San Onofre Nuclear Generating Station Unit 1
Reference:
Letter from J. A. Zwolinski, NRC, to K. P. Baskin, SCE, dated February 8, 1985 In conjunction with the issuance of Amendment No. 87 by the reference letter, you requested revised proposed acceptance criteria relating to air lock testing. The Safety Evaluation concluded that the proposed acceptance criteria were unacceptable based on the proposed value being substantially greater than what has normally been accepted by the staff.
Since the proposed acceptance criteria are based on the results of previous testing (including a minor allowance for fluctuation), proposal of lower acceptance criteria at this time would conflict with the existing plant design. It is, therefore, our intention to replace the air lock seals and make certain design modifications to the air lock in order to minimize leakage. This work will be conducted during the next outage of sufficient duration. Upon completion, leak testing will be performed to determine appropriate acceptance criteria. Subsequently, a proposed change to the Technical Specifications to incorporate these acceptance criteria will be submitted.
In conjunction with that submittal, acceptance criteria for seal tests of the active and passive containment ventilation isolation valves will be proposed.
Prior to submittal of the above acceptance criteria, surveillance testing will be performed as required. The existing acceptance criteria for combined type B and C testing will ensure any significant degradation of performance will be detected and corrected as necessary.
If you have any questions or require additional information, please let me know.
6505020200 850429 Very truly yours, PDR ADOCK 05000206 P
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