05000261/LER-1976-014, Updated LER 76-014:on 760805,util Notified by NRC That Peak Clad Temp Increase Presented by Westinghouse Should Be 50 F Higher.Caused by Using Different Versions of ECCS Model. New Limit in Effect 750825.W/760917 Ltr

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Updated LER 76-014:on 760805,util Notified by NRC That Peak Clad Temp Increase Presented by Westinghouse Should Be 50 F Higher.Caused by Using Different Versions of ECCS Model. New Limit in Effect 750825.W/760917 Ltr
ML20086D346
Person / Time
Site: Robinson Duke Energy icon.png
Issue date: 09/17/1976
From: Banks H, Mcgirt J
CAROLINA POWER & LIGHT CO.
To: Moseley N
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20086D349 List:
References
LER-76-014, LER-76-14, NG-76-1252, NUDOCS 8312010186
Download: ML20086D346 (2)
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LER-2076-014, Updated LER 76-014:on 760805,util Notified by NRC That Peak Clad Temp Increase Presented by Westinghouse Should Be 50 F Higher.Caused by Using Different Versions of ECCS Model. New Limit in Effect 750825.W/760917 Ltr
Event date:
Report date:
2612076014R00 - NRC Website
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text

_ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ . ___

~

1Jp'didkeport: HBR2 R0-76-14 (1)

Previous Report Date: 8-19-76 QENSEE EVENT REPORT O .

CONTROL BLOCK:l l l l l l l [PLEASE PRINT ALL EgeumE3 INFOIMATION) 1 8

"* YPE

'S'AM E LCENSE NUMBER O l S l C l Hl Bl Rl 2l . l 0 l 0 l-l 0l 0l 0l0 l0 l-l 0 l 025l [4] 1l 1l 1l 0l l0 l1l 14 15 2E 30 31 32 7 89 CATEceav "'E EE T coCui NuMeEn EvtNT oATE REPORT DATE QCON'T l l l (_7] [L_) l 0 l 5 l O l-l 0l 2l 6l ll l0 l 8 l 0 l 5 l 7l 6l l 0 l 9 l ll 7l 7l 6l 58 59 60 61 68 69 74 75 80 7 8 57 EVENT DESCRIPTION HE l On August 24, 1976 Carolina Power & Light was notified by NRC that the Peak Clad l 7 89 80

@l Temperature (PCT) increase which Westinghouse presented to the individual utilities l 80 7 89 3[ l should be 500 F higher due to use of different versions of the ECCS when making the l 7 89 80

@l comparison of PCT. This increase in PCT results in a reduction of the' limiting Fn l '

7 89 ~

80 l

EG l for Robinson 2 to 2.05.

80 7 89 pque C E M ACR M R v0LATON COCE COMPONENT CODE M l Zl Z l W 7 89 10 11 l Zl Zl Z]Z ] Z l Zl 12 17 W 43 lZ l9 l9 l9 l 44 47 W 48 CAUSE DESCAiPTION B0 l Westinghouse used a different version of the ECCS model when evaluating the effects l 7 89 80 7 89 to PCT of T..

auc versus T_ vuw

.. for the U' head fluid temoerature (Ref: HER 2 R0-76-14). l 80

@l This res.q1ted in an indicated increase in PCT of 50 F less than that value which l status  % POWER CTHER bfATUS OSCOVER DiSCOvFRY DESCAIPTON i

7 8

[f,.]

9 l1l0l0l l 10 12 13 N/A 44 l b45 l 46 Notification 80 l

AELE SFD OF AMOUNT OF ACitVITY LOCATCN OF AELEASE E (_Z_j 9

(Z_]EL ASE 10 lN/A l 44 l

45 N/A eo l

7 8 11 ,

PERSONNEL EXPOSURES DE105101 7 89 11 bI12 13 N/A .

80 l

PERSONNEL INJURIES Nu"BE R CESCAlPTON h l0 l0! 0l 7 89 11 12 l N/A 80 l

OFFSITE CONSEQUENCES gg l N/A .

j 7 89 -

80 LOSS OR DAMAGE TO FACluTY Tv Pf DE SCPIPT ON 3 [_j l N/A l PUBUC TY 2010186 760917 N/A g ADOCK 05000261 3 l

1 l PDR 7 89 80 ADDITIONAL FACTOAS

@l 7 89 Cause Description cont'd... results when using the same version for both temperatures l.

80 gl The new limit was placed in effect August- 25, 1975. l NAME: PHONE:

803-332-1351 y' ... ......,

n b3 U i

l l

September 17, 1976 FILE: NG-3513 (R) SERIAL: NG-76-1252 Mr. Norman C. Moseley, Director U. S. Nuclear Regulatory Commission Region II, Suite 818 230 Peachtree Street, N.W.

Atlanta, Georgia 30303

Dear Mr. Moseley:

H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET 50-261 LICENSE NO. DPR-23 UPDATE FOR LICENSEE EVENT REPORT 76-14 Attached for your consideration is an update to Licensee Event Report 76-14. This update relates the requirement to further reduce FQ to 2.05. Since this event is a continuation of the original occurrence, this report is treated as an update.

This report is in accordance with the format set forth in Regulatory Guide 1.16, Revision 4.

Yours very.truly,

,- ) y, ,

c 4.- -,

,/ a 'yd . v . - pr A't-4 H. R. Banks Manager Nuclear Generation e" , i

??

CSB:bb /)J .,

li: -

Attachment .- 'C,7W i a OCI2 >-

y cc: Messrs. W. G. Mcdonald L{b

\ . u.5.";[OE$ M)

E. Volgenau D ~*****

NM  :

i 9S94 i COPY SENT REGI -

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