05000317/LER-1979-001-01, /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

/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: 05000317/LER-1979-001, Forwards LER 79-001/01T-0
References
LER-79-001-01T, LER-79-1-1T, NUDOCS 7903050408
Download: ML19289D362 (1)

LER-1979-001, /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

Event date:
Report date:
3171979001R01 - NRC Website

text

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

LICENSEE EVENT REPORT CONTROL BLOCK: ]

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l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

I M i D l C l C l N l 1 l@l Ol0 l-1010 l0 0 10 0l0l@l4Il1111Il @l l

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7 8 9 LICENSEE CODE 14 15 LICENSE NUMSER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T 3% l L l@l 0 5101010 l 311 17 l@l01210191719 l@l012 2131719l@

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7 8

60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 60 EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h o

2 Durino nomal operation it was determined that the license submittal fnr i

l operation at 2700 MWth failed to indicate that credit for one charoino I

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loumo was taken in the small break LOCA analysis.

Pendino resolution of I

o 4

l this discrecancy, reactor power of both Units 1 ud 2 was reduced to 2560 I

o s

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iMWth.

A. E. Lundvall's letter to R. W. Reid of 2/12/79 describes this I

o 7

l event.

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SuSCIDE Sul $ E

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'#'EE Su'8C$cE CouPONENT CODE CO C0 12 Iz l@ l xl@ l l@ I z i z i z i z i z l z i@ lz l@ llj @

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7 8

9 10 11 12 13 18 19 20 SEQUENTIAL OCCU R R ENCE REPORT REVISION

_ EVENT YEAR R EPORT NO.

CODE TYPE N O.

@ yu'ER/ROl217I9I l-101011l l/l 1011 l l Tl l-10 1 Lag M

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24 26 27 3

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33 34 35 36 37 40 di 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 2

l Combustion Encineerino reanalyzed the 0.1 ft cold leo break in the cumo I

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ldischarce assumino no charoino oumos operable and concluded that the wall I

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

b l returned to 2700 MWth on 2/14/79 followino POSRC and OSSRC review of this I

3 ianalysis.

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7 8 9 80 ST

% POWER OTHER STATUS D1 O RY OISCOVERY DESCRIPTION lE l @ l019 I8l@l NA l

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AEnviTv CO0 TENT 7

8 REL8ASED OF RELEASE AMOUNT OF ACTivtTY LOCATION OF RELEA!E 1

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PERSONNEt ExPOSSES NUMBER TYPE

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PERSONNE t iN;uWiES DESCRIPTION @ NA NUMBER l

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8 9 11 12 80 PE DESCR ON lZ l@l NA l

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8 3 10 68.69 80 %

NAME OF PREPARER PHONE: