ML19341A917
| ML19341A917 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 01/15/1981 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Abel J COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8101290278 | |
| Download: ML19341A917 (2) | |
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Docket File 50-295 ORB #1 Reading Gray File 50-304 D. Eisenhut J. Kohler Docket Nos. 50-295 )
NRC POR R. Purple Zion Resid. Inspector and 50-304 Local PDR T. Novak GrJ TERA R. Tedesco Mr. J. S. Abel NCIS G. Lainas Director of Nuclear Licensing J. Roe comonwealth Edison Company J. Heltemes Post Office Box 767 OELD Chicago, Illinois 60690 I&E (3)
Dear Mr. Abel:
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We have reviewed the two Comonwealth Edison Com;khyN#"tNrs on CoMida-e ment purge dated January 14, 1981 in which CECO proposes to modify their earlier commitment to our interim position. Pending the completion of the long term review for containment purge of Zion 1 and 2 we find the proposed purge operation acceptable with the following elements:
(1) The CECO plan is temporary and will be used when the reactor is not in the refueling or cold shutdown mode for only a few days duration, when necessayy to improve work-ing conditons to perform a safety related surv6411ance or safety related maintenance prodecure. Purging times during
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these modes will be held to as low as reasonable achievable.
(2) The purge valves will be positioned between 30* and 50' from the closed position by limiting air supply pressure on the valve operator.
(3) Valve positdan for both inside and outside purge valves will be verified at the beginning of the purge and each time there is reason to believe the positions have changed. Outside purge valses position will be checked every five (5) days while is the purge mode.
(4) Air pressure to hold the valve position between 30*and 50' will be measured at the be(inning of the purge and checked daily thereafter. Any significant change in the aM pressure will constitute reason to believe the valve positions have changed.
(50 If any punge valve position is found to be above 50' or below 30' while in the purge mode, the affected valve (s) is to be returned to an acceptable position within one hour or the
@ #9 containment purge is to be immediately discontinued and th e d;f,,, {[f,,) s valves shut. NRC will be advided of any such occurrence e
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The above conditions are as contained in the CECO January 14, 1981 letter and as modified c'uring discussions and agreement with your staff. There conditions and your modifications of the earlier CECO commitment trans-mitted by letter dated December 14, 1979 in no way modify our interim position requirements on containment purge.
If there is any further questions on this matter, please let us know.
Sincerely, Steven A. Varga, Chief Operating Reac44rs Branch #1 Division of Licensing S
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