05000263/LER-1977-003

LER 77-03:on 770127,TIP Ball Valve Failed to Close During Use of Sys.Cause Undetermined.Valve Disassembled,Inspected & Found in Good condition.W/770209 Ltr

ML20056B855
Person / Time
Site:	Monticello
Issue date:	02/09/1977
From:	Mayer L, Nevinski D NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-77-03, LER-77-3, NUDOCS 9102130464
Download: ML20056B855 (2)

LER-2077-003,

Event date:
Report date:
2632077003R00 - NRC Website

text

_ _ _ _ _ _ _ _ _ _ _ _ _

- LICENSEE EVENT REPORT CenROL etOCol l I l l I I 1

6 porus ==r au neeummo mmamarem NAME LCENSE LCENSE NUMBER EVENT TvPE 7E 89 l_v l Nl Ml Nl Pl 1l TYPE 14 l0l0l-l0l0l0l 0l0l-l0l0l 25l 4l261l 1l 3l 1l 15 30 l0l1l 31 32 CATEGORY T S d[

hCONT57 l l l !T] [.L ) l 0 l S I 0l-l 0l 2I 6l3 l 7 8 DOCKET NUMBER EVENT DATE REPORT CATE SS 59 60 61 68 l 0 l 1 l 2l 717l747l l0 l 2 l0 l9 l 7l 7l 69 75 -

80 EVENT DESCRIPTION 7@ 89 l DURTNG 100% POWER OPERATION ON 27, 1977, NO. 3 TIP BALL VALVE FAILED TO ANUARY l

7 SE I<iner wrv m unney-r mer nr rur mr, eve rw 60 89 ornT-,1w curi, nT yr noroint e uT T I 60 7h l89 VALVE INVESTIGATION REVEALED VALVE NOTHING: WAS TAPPED AND IT CLOSED. VALVE WAS l 60 78 l_ REPLACED WITH LATEST MODEL WHICH HASTHREE AN PREVIOUS IMPROVED OCCUR- OPERATOR. j

@89 7 89 8 RENCES. (R0 50-263/ 77-0) . 60 mE l

CODE bO COMPCNENT CODE SN 8 ls in I LIJ 7 89 10 lviAltIvielxl bd Ic l0 is 10 i R vcLATON 11 12 17 43 44 47 LnJ 48 CAUSE DESCRIE riON

@l CAUSE UNDETERMINED.

7 89 . VALVE WAS DISASSEMBLED INSPECTED AND FOUND IN GOOD CONDITIO bd 8 1 VALVE ENUFACTURED FOR GE COMPANY BY 7 89 GENERAL PNEUMATICS

1. 608-K0J06). ,l (

nl UO i

sta s  % POWER 3

7 8 W

9 l1l0l0l12l13NA 10 OTHER STATUS

__ l O scovf AY W l NA OtSC0wERY DESCR6PTON 44 45 46 I ACTrvtTY C04 TENT 60 PELEASED OF RELEASE i

H La_J LaJ l NA AMDUNT OF ACTMTV I

LOCATON OF RELEASE 7 8 9 10 11 I NA 44 45 I PERSONNEL EXPOSURES 60 NUMBER TDPE DESCRiPTO,4

"" I 7 89 I d 0101 LaJlNA 11 12 13 '

i PERSONNEL INJURIES b NUMBER

• DESCRIPTON 8 1.010101 I 7 89 NA 11 12 l OFFSITE CONSEQUENCES 80 El NA 7 89 LORS OR DAMAGE TO FACILITY J

TV E D 60 M W l ESCRIPTON 7 89 NA 10 l

PUBLCITY 60 DQ l NA 7 89 l

ADDITONAL FACTORS 80 Mi Ni 7 89 9102130464 770209 CF I ADOCK 05000263 go

@l 7 89 CF I

NAME. D. E. Nevinskt so g .

t PHONE. 512/295-5151

. s. #

(

__ _ _ _ __.-.___ __________________ _____________m_

.. U ,','__ N '.. b e.a._______a

,- 7

• G ,.h..

, . - y -

?/L HSP NORTHERN STATES POWER COMPANY wmu ramou s. wiwwa sova es oi February 9,1977 Mr J G Keppler, Director, Region III Office of Inspection 6 Enforce =ent

U S Nuclear Regulatory Counission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

MONTICELLO NUCLEAR GENERATING PLAIC Docket No. 50-263 License No. DPR-22 No. 3 Tip Ball valve Failure To Close The Licensee Event Report for this occurrence is reproduced on the back of this letter. Enclosed are 3 copies.

Yours very truly, 0 , m 't L 0 Mayer, PE i

Manager of Nuclear Support Services LOM/MHV/deh l

cc: Director, IE, USNRC (40)

Director, MIPC, USNRC (3)

G Charnoff MPCA Attn: J W Ferman

-over-FE3111977