ML20086L502

Requests Temporary Waiver of Compliance from TS 3.1.1.3 Re Moderator Temp Coefficient,Per 911206 Telcon.Requests That Requirement to Shutdown Plant Be Extended by 72 H to 911209

ML20086L502
Person / Time
Site:	Callaway
Issue date:	12/06/1991
From:	Schnell D UNION ELECTRIC CO.
To:	Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20086L500	List: ML20086L502
References
ULNRC-2528, NUDOCS 9112160286
Download: ML20086L502 (5)

Text

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December 6, 1991 cj _..

Mr. A. Dart Davis DmM E NU k., [J,q qy Regional U. S. Nuclear Administrator, Region III Rcquiatory Commission ' '

J,J/('7J(f( 799 Roosevelt Road 5 Glen Ellyn, IL 60137 "Ei' ULNRC- 2 52 0

Dear Mr. Davis:

DOCKET NUMBER 50-483 CALLAWAY PLANT REQUEST FOR REGIONAL TEMPORARY WAIVER OF COMPLIANCE

This letter requests a Temporary Waiver of Compliance

! f rom Technical Sr

• cification 3.1.1.3, Moderator Temperature I

coefficient (MTC) as discussed during a teleconference on December 6, 1991 at 1000 CST between Union Electric and the NRC Staff. This Technical Specification contains Action b which reads: "dith the MTC more negative than the EOL limit specified in the COLR, be in HOT SHUTDOWN within 12 hourr."

Currently, COLR Section 2.1.1 specifies that the End of Cycle Life (EOL) MTC shall be less negative than -41 pcm/*F.

Action Statement 3.1.1.3.b wie entered at 0227 CST on December 6, 1991 when the 20J ppm MTC was measured at n48

.pcm/'F. At the time of the teleconference, callaway Plant was in Mode 1 - power Operations.- The- LCO period will expire .

at 1427 CST ct December 6, 1991. Union Electric requests that the requirement to shut down the plant be extended by 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 1427 CST on December 9, 1991 by which time the EOL MTC litalt in the COLR will be revised as discussed below. -

The basis for.the Temporary Waiver of Compliance request is provided below: ,

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Background' .

1. Technical Spesification 4.1.1.3.b requires that the MTC be measured within 7 EPPD after reaching an equilibrium boron concentration of 300 ppm and compared to tha 300 ppm surveillance limit specified in the COLR (which is -32 pcm/'F). Technical Specification - 3.1.1.3.b requires that the plant be in HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> if the MTC is more negative than the EOL limit specified in the COLR (which is -41 pcm/*F). At 0227 CST on December 6, 1991 Action Statement 3.1.1.3.b was entered since the 300 ppm surveillance measured the MTC as -48 l pcm/*F. An extension of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> beyond that given in Specification 3.1.1.3.b is requested. I 9112160286 911246  ;;

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2. At 0227'~on December 6, 1991 Acilon Statomont b '

of 'Icchnical_ Specification -3.1.1.3 wins entered sir:e 1

' the 300 ppm l'TC survellianc1 moacured u MTU : 2 -4d pcm/*P. Thjs survoillance mest be performed within 7 CPPD af ter roa.:hing an equilibrium boron concentration _ of 300 pptr. By. the :tature of the timing of_this surycillance, this situation cou1G not hvio uten foreticon or avoided. Prompt action is t

needed to extend tha s'autdown time .11mit' to avoid the cooldown tra.isient thct would he imposed on tho i . plant by an unnectssary shutdown to Mode 4 d conditionn q C2,ipensatorg,3etjons '

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3. The plant is Lt ..tcady rtate, full puact conditions. l kestinghouso is currently in the process of

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performing plant-specific calcylations to justify j  : revt.8ing the COLR linit; however, this.will not be -

W cotypleted until.after t.ic' Technical np oification -

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3.1.1.3 b -ahutdown tilne limit has expired.

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4. Lestingh use han p.:eliminarily indicated that the

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d- . PSAR hafety saalysaJ are: valid-for an'MTC.cf >J9.3 -

J pcm/*P for All rods out at hot full-power.  !

~L Thit bct nds the rnar$ red valuo. Wnstinghous 2 has '

i analyzed s4 mil t r- plants for .:orresponding dchreahs

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i t the MTC.w!.thcut requ!. ring protection uystem l 1 ,  ; setpoint changes _ tod has demonstrattal compliance with der /gn limits. West nghouse in currently'-  ;

'i, performing calcul.tions to-sud,. sort a relaxat' ion in '

, , : the , ;p COL._MTC

. linit spectied in3the.COLR.

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4. The *. hotr extension:will-allow the plant to p ' -

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7 stabili.t 1-its power for-- 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> and run a

" _ !- confirmatory MTC surveillance test and will also i provide sufficient time for Westinghouse to completi

.their calculations. 'I'nis will' avoid an unnecessary cooldown. transient on-the. plant, ,

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q nificant' Hazards Considerations ,

l' 6*.-The< requested extension does not alter any aspects of plant-design or operation. No new accident

initiators, transient precursors, failurc

• me hanisma,'or . limiting single, failures are in,.roduced ae.a result of this change. Therc is_no '

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3-changn to the manner in which saicty limits or limiting safety system sottings are determined. The EOL MTC limit correspords to the most positive moderator density coeffAc hnt used in the FSAR analyses. Weetinghouse has preliminarily stated that the PSAR analyses are valid t.'or an MTC as negative as -49.3 pcm/*F (all rods out, hot full power) and is in the process of formalizing a revision to the COLR to revise the ECL MTC limit. The extension wi.ll allow the COLR revision process to be completed and adoid a plar;t uhutdow.) transient. Given the above, the extention request uoes not involve a significant hazard consideration.

Environmental Con _pequenegg

7. The requested extension will not result in a change in the types or tunounts of an)? plant of fluonts nor a chrsgo jn indiviilual or . mulative occupa:lonal radiation exposvre. As ' .4, this request does not involve itirovertible env2.ronmental consequences.

Rev1_cw and Appraval Procaps

8. The Onsite Review Committee hh1 approved this request for Temporary Waiver.

Union Electric intends to discuns.the status of corc' conditions and the results of the fo.. low-on MTC l surveillance with Region Ill on Tuesday aftornoon', December s

. 10, 1991. If'the COLR revision is not completed ~'as discussed' "

above, the pla'nt wil'1 bc'in HOT SHUTDOWN by 1427 CST on December 9, 1991.

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• J Very truly, youes, -

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G? $42 4 Donald F. Schnell F

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'ITATE OF MISSOURI )

) SS CI). OF ST. It>UIS )

Donald T. Schnell, of lawful age, being first cW1y swe/2n upon at- mays that he is Senior Vice President-Nuclear and an office L Union Electric Company; that he 'las rehd t. e f nmgoing ,

document and knows the content thereof; thatt he has exec' tr ' the same for and on behal f of said company with full po 4 ,r at.'1 author!: to do so; and that the facts thoroin utsted are true at.d correct co the best of his knowledgo, information and be'I f.

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l By, .Jgt, y a  :

D2inald F. Schiiolk  :

Senior Vice P"esident Nuclear SUBSCRIBLD'and sworn to~before no this ,

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Shaw, Pittman, Potts & Trowbridge i

2300 N. Street, N.W.

Washington, D.C. 20037 Dr. J. O. Cermak CFA, Inc.

18225- A Flower liill Way ,

Gaithereburg, MD 20879 5334 R. C. Knop Chief, Reactor Project Branch 1 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Druce Bartlett Callaway Resident Office

- U.S. Nuclear Regulatory Commission RR#1 Steedman, Missouri 65077 J.-R. Itall (2)

Office of Nuclear Raactor Regulation U.S. Nuclear Regulatory Corumission 1 White Flint, North, Mail Stop 13E22 ,

11555 Rockville Pike Rockville, MD- 20852 Manager, Electric rapartment- * '*

Missouri Public' Service Commission

• P.O.. Box 360 . '

,, ,. . ' , lJufferson ,,City,i MO 65162 -

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L , ;c / ,.. .U.S. Nuclear ReguJ.atory Comminsion. '

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Mai1 S.ation P1-137 Washington, D.C. 20555 r

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