ML19329A441
| ML19329A441 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/12/1975 |
| From: | Parker W DUKE POWER CO. |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19329A440 | List: |
| References | |
| NUDOCS 8001031008 | |
| Download: ML19329A441 (2) | |
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- 2yy.ayey September 5, 1975 Mr. Roger S. Boyd, Acting Direct.or Division of Reactor Licensing U. S. Nuclear Regulatory Commission'
- k'ashington, D. C.
20555 i
Re: Oconce Nuclear Station Docket Hos. 50-269, -270, -287
Dear Mr. Boyd:
An' August 4, 1975 Ictter from Mr. Karl R. Coller requested that we determine if containment leakage testing at the Oconee Nuclear Station is in full compliance with 10CFR50 Appendix J.
The letter stated that
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it should be understood that while the present program may be in compliance uith Technical Specifications, it uay not be in con-
.fg formance with Appendix J.
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The Oconce Technical Specifications, approved by the Commission on February 6, 1973, October 6, 1973 and July 19, 1974, are in compliance
.with 10CFR50 Appendix J, as issued on March 6, 1973, with one exception.
Oconec Technical Specification criteria for testing of containment air locks do not conform t.o our interpretation of the criteria of Section Ill.D.2 of. Appendix J.
Appendix J requires a Type B test of containment air locks at six-month intervals; however, those air locks which are opened during such intervals are also to bcI tested after each opening. ;0conec Technical Specification 4.4.1.2.5 r'equires testing of the outer door scals at four-month intervals, except when the hatches are not. opened during.that interval, and in no case chall the test j
interval be longer than 12 months.
.The.0conec personnel and emergency air lock 3cak rate tests arc.per-formed-by pressurizing the air lock between the inner and outer doors.
1 This test'tends to seat the outer door and unscat the inner door.
In order to complete the_ test, a restraint is placed on the air lock side of 'the luncr door to physically restrain the door from lif ting eff.its_ seat.
After the test is completed, the air. lock must be o}iened to' remove the restraints, therchy negating the test since LAppendix'J requires an air lock test cach time the air lock has been
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opened. This appears to be a generic prob 1cm with air locks.
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-Mr.l Roger S. Boyd
- Page 2 September 5, 1975 The air lock. Icak rate test requires several hours to perform since the entire air lock volume has to be pressurized to 59 psig and a leak rate establinhed.
Appendix J does not specify under what unit conditions the Icak rate test iu' required.
Thus, although entry to the Reactor Building is normally made several times a wee}c, maintenance outance when the reactor is in a hot or cold shutdown condition require entry numerous times cach day.
Thus, the requirements of Appendix J are not prac tical.
' In light of the design of the Oconec containment air locks, and the
' impracticality of the requirements of Appendix J.'and the Commission's previous review of the acceptability of the Oconec Technical Specifi-cations, it is requested that an exemption pursuant to 10CFR50, Section 50.12, be granted and testing be permitted to continue in accordance with t'hc present Technical Spccifications.
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.Very truly yours,e lO. tk iA./
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Uilliam O. Parker, Jr. L _,)
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