ML20010E674

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Notifies That Limiting Conditions for Operation & Surveillance Re Suppression Chamber - Drywell Vacuum Breaker Will Be Included in Facility Tech Specs
ML20010E674
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 09/02/1981
From: Colbert W
DETROIT EDISON CO.
To: Kintner L
Office of Nuclear Reactor Regulation
References
EF2-54-622, NUDOCS 8109080133
Download: ML20010E674 (2)


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? se,s$$ g September 2, 1981 EF2 - 54622 Mr. L. L. Kintner U. S. Nuclear Regulatory Comission Division of Project Management Office of Nuclear Reactor Regulation Washington, D. C. 20555

Dear Mr. Kintner:

Reference:

Enrico E'ermi Atomic Power Plant Unit 2 NRC Docket No. 50-341

Subject:

Suppression Chamber - Drywell Vacuum Breakers Detroit Edison will include the following limiting condition for operation and surveillance as part of plant's technical specifi-cations:

LIMITING CONDITION FOR OPERATION All suppression chamber-drywell vacuum breakers shall be operable and closed with a total leakage between the sup-pression chamber and the drywell of less than the equiva-lent leakage through a 1-inch diameter orifice at a differential pressure of 1 psi.

SURVEILIRCE Each suppression chamber-drywe.ll vacuum breaker shall be demonstrated operable at least once per 31 days ana within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after any discharge of steam to the suppression chamber from the safety / relief valves, by cycling each vacuum breaker through at least one test cycle and verify-ing that each vacuum breaker is closed. gdI S

I O 0109080133 810902 -

PDR ADOCK 05000341 A PDR

Mr. L. L. Kintner September 2, 1981 EF2 - 54622 Page 2 At least once per 18 months during shutdown a leak test at an initial differential pressure of 1 psi will be con-ducted to verify that the differential pressure does not decrease by nure than 0.25 inches of water per minute (or a 10 minute per.iod.

Sincerely, f/f $f W. F. Colbert Technical Director Enrico Fermi 2 hTC/MKD/dk cc: B. Little