ML19289D362

LER 79-001/01T-0 on 790209:found That License Submittal for Operation at 2,700 Mwt Failed to Indicate Credit for One Charging Pump Was Taken in Small Break LOCA Analysis. Reanalysis Concluded That 2,700 Mwt Was Safe Level

ML19289D362
Person / Time
Site:	Calvert Cliffs
Issue date:	02/23/1979
From:	Carroll J BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289D360	List: ML19289D359 ML19289D362
References
LER-79-001-01T, LER-79-1-1T, NUDOCS 7903050408
Download: ML19289D362 (1)

Text

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: ]

1 I i l l l 6

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 7 0 i 8 9 I M i LICENSEE D l C lCODE C l N 14l 1 l@l 15 Ol0 l- 1010 l0 0 10 LICENSE NUMSER 0l0l@l4Il1111Il @l 25 26 LICENSE TYPE JO l

57 CAT 58 l@

CON'T 7

o i 8

3% l 60L l@l 0 5101010 61 DOCKET NUMBER l 311 17 l@l01210191719 68 69 EVENT DATE 74 l@l012 75 2131719l@

REPORT DATE 60 EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h o 2 Durino nomal operation it was determined that the license submittal fnr i o 3 l operation at 2700 MWth failed to indicate that credit for one charoino I o 4 loumo was taken in the small break LOCA analysis. Pendino resolution of I o s l this discrecancy, reactor power of both Units 1 ud 2 was reduced to 2560 I o 6 iMWth. A. E. Lundvall's letter to R. W. Reid of 2/12/79 describes this I o 7 l event. l 0 8 l

' CO I:'E '#'EE C0 Su'8C$cE CouPONENT CODE SuSCIDE Sul $ E o 9 12 Iz l@ l xl@ l l@ I z i z i z i z i z l z i@ lz l@ llj @ 20 7 8 9 10 11 12 13 18 19 SEQUENTIAL OCCU R R ENCE REPORT REVISION L _ EVENT YEAR R EPORT NO. CODE TYPE N O.

ag

@ yu'ER/RO l- 101011l l/l 1011 l l Tl l- 10 1 M

l217I9I 22 3 24 26 27 3 a 30 31 32 KN A O O P NT M HOURS 22 S8 i FOR B. SUPPLIE MA UF RER IX 33 lgl 34X I@ lBl@

35 lzl@

36 l011l2lD 37 40 ldiN l@ lNl@

42 12l@

43 lZl919191@

44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l Combustion Encineerino reanalyzed the 0.1 2ft cold leo break in the cumo I i i ldischarce assumino no charoino oumos operable and concluded that the wall I

, , ibreak LOCA is still less limiting than the larae break. Both units were i

, 3 l returned to 2700 MWth on 2/14/79 followino POSRC and OSSRC review of this I i , ianalysis. I 7 8 9 80 ST  % POWER OTHER STATUS D1 O RY OISCOVERY DESCRIPTION NA NA 7

i s 8

lE l @ l019 I8l@l l lDl@l

l AEnviTv CO0 TENT REL8ASED OF RELEASE AMOUNT OF ACTivtTY LOCATION OF RELEA!E 1 6 l l@ '

gl NA l l NA l

PERSONNEt ExPOSSES NUMBER TYPE DESCRIPTION NA 1 7 l010 l0 l@l Zl@l" "

l PERSONNE t iN;uWiES NUMBER 7

i a 8 9 l0 l0 l0 l@lDESCRIPTION @ NA 11 12 80 l

PE DESCR ON 9 NA l 7

1 8 9 lZ l@l to 80 PUBLICITY NRC USE ONLY 2 o 'fE [@f '" " NA 790305O M 68i .69iiiiiiiiiiiiii 80 %

7 8 3 10 NAME OF PREPARER PHONE: