ML18054A732
| ML18054A732 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 05/04/1989 |
| From: | Frisch R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-64339, NUDOCS 8905110261 | |
| Download: ML18054A732 (1) | |
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I consumers Power POWER I Nii MICHlliAN~s PROGRESS General Offices: 1945 West Parnall Road,Jackson,'MI 49201*(517)788-0550 May 4, 1989 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT -
AIR LOCK LEAK TEST TECHNICAL SPECIFICATION CHANGE REQUEST ADDITIONAL INFORMATION (TAC NO. 64339)
During a telephone conference call between the NRC and Consumers Power Company on May 1, 1989, the NRC reviewer requested justification for use of 10 psig as a minimum test pressure for the containment air lock doors in our April 20, 1989 revised change request.
The following justification is provided.
The Palisades Plant uses a pressure of 10 psig as a minimum test pressure on the air lock doors because the air lock doors can't be tested at Pa without installing stongbacks.
The manufacturer's recommended test pressure without strongbacks is 15 psig.
This minimum pressure allows an adequate pressure band to satisfactorily test the seals, without damaging the doors and latching mechanism, and is sufficient to determine if the seals are operable.
This position is supported by a letter to NRR dated August 29, 1984 from Consumers Power Company.
Additionally, NRC staff guidelines (Reference Big Rock Point Docket No. 50-155, dated August 4, 1980) state for those plants which require the use of a strongback or clamps to leak-test the door seals at a pressure, Pa, a lower pressure (e.g., manufacturer's recommended pressure, which would not require the use of such clamping devices) should be used to conduct the intermediate test.
The results of leakage tests at the reduced pressure are conservatively extrapolated to the leakage at the accident pressure, Pa, to determine acceptability.
'g~\\~;&,l Senior Licensing Analyst CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades
- 39051 l026C-Ei9ci-5ci4 _______ \\
PDR ADOCK 05000255 P