ML19327C194

Requests Enforcement Discretion Re Containment Integrity Requirements Due to 891109 Inoperability of Emergency Diesel Generators,When Svc Water Pump Discharge Strainers Determined Not Analytically Qualified to Seismic Criteria

ML19327C194
Person / Time
Site:	Millstone
Issue date:	11/09/1989
From:	Keenan J NORTHEAST UTILITIES
To:	Russell W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19327C192	List: ML19327C194
References
EN2-89-264, NUDOCS 8911210133
Download: ML19327C194 (2)

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I fut W.T.Rossell Region 1 Admintntratur ll.S. Nuclear Reculatory Commission l i

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-t it 2 Sut)pri ntetident Millstone Nuclear Power Station 4ab$ccis Request For Enforcement Dtscretion l

Refer enc eh t (1) Generic Letter No. 98-17, " Loss of Decoy Heat RomnvAl" ,

(2) E.J.Mrnerka Letter to U.S. Nuclear Regulatory  :

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' Comn. i n s i o n , Loss of Decay Hoat Remove! -

GL RRel7, dated December 23, 1980 Northeast Nuclear Energy Companv hereby repoents  ;

a temporary exemption to the requir ements of Unit l 2 lechnical Specification Action Statement i 3.R.P.R. SpeciflCally, we propose to position the Containment Equipment Hatch in a posittnn Capable of being shut within two hours of an event whleh results in a loss of decey heat remnval. This action would be under tal en rett.pr

,than closing and sealing the Containment .

f Equipment Hotch as required to establich i CONTAINMENT INTEGRITY In accordance with Technical Specification Action Statement 3.0.2.2. [

Botkoround ani Bas.11 At approximately 1945 hours0.0225 days <br />0.54 hours <br />0.00322 weeks <br />7.400725e-4 months <br /> on November 9 1989 Millstnne Unit 2 was informed that all thr ee ,

Service Water pump discharge strainers had been determined analytically to be nel qualifie(l to ,

the appropriate seismic criteria. As a result of f this condition, both Service Water headerc, hence both Emergency Diesel Generators and both Shutdown Cooling loops, have been declared INOPFRABLE. An llNilSUAL EVENT was declared at >

approximately 1925 hours0.0223 days <br />0.535 hours <br />0.00318 weeks <br />7.324625e-4 months <br />, csm nev $* ' kh P

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Among the Technical Soccification Limiting  ;

Cnnditions for Operation which can,not be j '

satisfied i n t he condi t. inn descr ibed abov* is * ,

3.8.2.2. "A.C. Distribution - Shutdown". As noted '

above, the Action reautremont for thi% 1.CO requires establishing CONTAINMENT INTFGRITY. $

Out basin for deviating from this requirement in  ;

the case of the Cnntainment Equipment Hsich recul ts frnm nur analysis of, and preparations for Inss of Decay Heat Removal as requ e red hv .

reference (1). In our respongo to Gener ic l.ptter 08-17 troferente (2)). we committed to " i n.p l emen t pror.edures and administ rat ive contro'4 s to reasonably assure containment r.lasure within

[122 minutes 3 following a iner of Ghutdown .l Coo!)ng". We maintain that our present conditien.

, i . e' . . the seismic discualification of our Gervier ,

Water headers is cn morn 1)*iting then a . noss of )

550trinwn Coo l i ng from a Reduced Inventerv condition, for which the proposed positioninQ tif the Containment CQuipment Hatch has been reviewed I and found acceptable. Explicit in our proposal is a commitment to not enter into Reduced Invnnterv operations until the seismic condition of ai -

least'one Service Water header is restored.  ;

We appreciate the continuing dialogue which has '

taken place on our current emerQency event. We remmin available to discuss plant conditions or ,

this request for enforcement discretion, as j

,necessary. ..  ;

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