05000000/LER-1977-012, :on 770620,during Investigation of Cycle 5 Max Critical Power Ratio Limits,Ge Found That Pump Trip Delay Time Assumed in Original Cycle 5 Transient Analysis Not Appropriate.Amend Request Will Be Submitted: Difference between revisions

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M I N N E A PO Ll e, M I N N E S OT A 58401 June 27, 1977 Mr J G Keppler, Director, Region III Office of Inspection 6 Enforcement U S Nuclear Regulatory Cornission 799 RooseveIt Road Glen Ellyn, IL 60137
 
==Dear Mr Keppler:==
MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 i:%.! '.t-MCPR Non-Conservatism l
The Licensee Event Report for this occurrence is reproduced on the back of this letter.
Enclosed are three copies.
Yours very truly,
'Tnkt)at/b L 0 Mayer, PE Manager of Nuclear Support Services LOM/MHV/deh cc:
Director, IE, USNRC (40)
Director, MIPC (3)
G Charnof f MPCA Attn:
J W Fe man M
}}
}}


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Latest revision as of 02:22, 26 May 2025

:on 770620,during Investigation of Cycle 5 Max Critical Power Ratio Limits,Ge Found That Pump Trip Delay Time Assumed in Original Cycle 5 Transient Analysis Not Appropriate.Amend Request Will Be Submitted
ML20086D496
Person / Time
Site: 05000000, Monticello
Issue date: 06/27/1977
From: Mayer L
NORTHERN STATES POWER CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19289B550 List:
References
LER-77-012, LER-77-12, NUDOCS 8312020179
Download: ML20086D496 (2)
v • d • e


LER-1977-012, on 770620,during Investigation of Cycle 5 Max Critical Power Ratio Limits,Ge Found That Pump Trip Delay Time Assumed in Original Cycle 5 Transient Analysis Not Appropriate.Amend Request Will Be Submitted
Event date:
Report date:
0001977012R00 - NRC Website
v • d • e

text

i-gi i i r raI

i'- '

r-i.i q

r--

l yi e

n i um un l

g p u-qp.

- r si pi

,u p

r=

g LICENSEE EVENT REPORT O CONinOL DtOCK-(

l l

l l l

l 1

(ptEADE PRINT ALL AtoportED INFORMATION) 6 t Cf NLit NAME LCINst NtAssgra t ot Nst t yt N1

.d l Ml N lM l N l P l 1 l l0 l 0 l-l0 l 6 l 0l 0l 0l-l0 l0 l '[4 l1 l1 l1 l1l l0lIl IvPt IVPI UU 14 15 25 26 30 31 32 "N $NN cAtscony i

Wi] CON 7l l

l

(.T.J [LJ [0 l510 l-101216 l 31 l O l 6121017171 [.0l 61217 l 7171 00Catt NUutwei IVENT D4lt satronT Daft D

$7 bU 59 60 61 00 b9 74 75 00 EVENT DESCR.PTION

@ LDURING AN INVESTIGATION OF CYCLE 5 FCPR LIMITS GLNE 89 l

] [ TIE P!NP TRIP DiiLAY TIhE ASSUMED IN DE ORIGINAL CYCLE 5 U0 H9 l

B l HUT APPROPRIATE. I!SE OF AN AITRO?RIATE DEIAY TIME WAS CONSERVATIVELY ES l

00 n9

$ l INCRFASF 'I1E TilANSITNT* TmTTA-CPR IT)R TYYill 7r7 AN 80 OD A 1.TCW9F I

B [ AMENDMENT REOUEST TO OMNGE 11E TECINICAL SPECIFIC 60 O9 I

'cE"

'c'o"di' 80 counoNtNt cooi "J *'

uCu'rla E II 12 i LCJ l Elz Iz 12 I z I al tz_J II Iz la la I LN_1 su a

wwo~

UU 10 11 12 17 43 44 47 43 CAUSE DESCniPTION

@l IOR *DE 'IKO PUMP TRIP FOLIBilNG A 7URBINE TRIP. TIE ORIG HC B 1 ASSlBED A 0.1 SECOND DELAY TOR PlNP ELELTRIC 00 B9$l ON EVALl!ATION OF STAR 1UP TEST DATA, A DEIAV 0F 2.0 SECONPS IS APPR 80 U9 I

statu

% POWER CD

_il LEj l0 l9 l8 l [

NA l

(DJ l

LETTER Fim CR E NSP 01HER S1A1US DGCOvtl4 DGCOVf RY DisCAP10N U

10 12 13 44 45 46

^!inCo !?2cc 80 i

lli LzJ LNA I

INA

.uon~, D,

,c,,,,,,

toc.1oN o, mu.st U

9 10 11 I

PERSONNEL EXPOSURES 44 4b DO Nuuni n tvPt Discruptos 1101010I LzJ l

NA JD 11 12 1a I

PERSONNEL INJURIES 00 NUMHf 54 DI SC AIP T ON j[_Of0l0l

[ NA 19 11 12 l

OFFSITE CONSEQUENCES 00

[ NA 9

l LOSS Ort OAMAGE TO FACILHY ivn Discnir ton 8312020179 700426 UD [2]

[ NA PDR ADOCK 05000263 S

PDR 9

10 l

PUBLICITY 00 l NA D

l ADDITIONAL FACTOris 00 L SimMI1TED.

TE CURRENT ?CPR LIMITS IMVE BFEN Alf.HNISTRAVELY INCREA l

D [NOPREVIOUSOCCURRENCE.(R050-263/77-12) 00 l '

7

,f.,,,'.

if'N O

O

,yOLm a

e NORTHERN STATES POWER COMPANY

^ -

M I N N E A PO Ll e, M I N N E S OT A 58401 June 27, 1977 Mr J G Keppler, Director, Region III Office of Inspection 6 Enforcement U S Nuclear Regulatory Cornission 799 RooseveIt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 i:%.! '.t-MCPR Non-Conservatism l

The Licensee Event Report for this occurrence is reproduced on the back of this letter.

Enclosed are three copies.

Yours very truly,

'Tnkt)at/b L 0 Mayer, PE Manager of Nuclear Support Services LOM/MHV/deh cc:

Director, IE, USNRC (40)

Director, MIPC (3)

G Charnof f MPCA Attn:

J W Fe man M

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