ML20058K704
| ML20058K704 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 03/26/1975 |
| From: | Clarity M, Mayer L NORTHERN STATES POWER CO. |
| To: | Anthony Giambusso NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| LER-LER-750326, NUDOCS 9102130516 | |
| Download: ML20058K704 (2) | |
Text
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COfdTROL BLOCX:[ l l
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(PLEASE PRINT ALL REOUMED SIPORMOT *J '
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(CENSE E LCg NS[
EVENT l
NAME LCENSE NUMBE A TYPE TYPE l
blM!N ! Ml ' ! P ! 1j l 0 l 0!-l0 l0 l 0 ! 0 l 0 !-I 0l0 l l4 l1 l1 l1 l1 l l0l1l 7 89 14 16 25 26 30 31 32 h I[ uke DOCK E T NUMBE R EVtNT DaTE RE PDAT DATE CATE GORv T
D 1 CON'T l P I 0 l d
W l Ol 5l 0l-l0 !2 l6 l3 l l 1 l 2 ! 31 O! 7l 4l l 0l 31286 l7 l 5 ;
7 8 57 58 59 60 61 68 69 74 75 80 CVENT DESCHiPTION
-~W
^
HE I uuring surveillance test, acIc outboare steam line isolation valve failee to close. l 7 89 80
$l The redundant isolation valve was operable.
Similar event occured August 26, 1974
}
7 8D 80
@l (A0 4-25) l 7 89 80
$l l
7 39 B0 bl l
7 89 80 gg SYSYEM CAUSL COMPUNENT COMPONENT CDDE CODE COMPONEN1 CCDC SUPPULA MANUFACTUHER VOLATON O
ISlDl d lV ! A lL l V! OlPJ lA l l L 12 l010 l QI 7 89 10 11 12 17 43 44 47 46 CAUSE DESCRIPTION DE l Valve was inspected during recent refueling outage and the valve's limit and torque l 7 89 80
[switcheswereadjusted.
In addition. it was found that the main gear train grease j 0
7 89 RO 1O l and limit switch grease had deteriorated.
The gear trains were thoroughly cleaned l
7 89 80 i aCa.rt <
u.:Twoo os 51ATUS
% POWFA OTHEA STATUE D;SCO d c
- 0:SCDvfCv DE SCAePT ON h
[1]
l0l7l5l [_LA l
[p.]
l NA l
7 8 9
10
"?
13 44 4b 46 B0 FonM or ACTfVriv CONTENT ALLEAS D OF AELE ASE AMOUNT CF ACTrvrf y LOCATON OF AELEASE h
b l NA l
l NA l
7 8 9
10 11 44 45 80 PERSONNEL EXPOSURES NUM BE R TvPf D E SCAiP' ON 13 l 0 l 010l
[J,]
l NA l
7 89 11 12 13 BO PERSONNEL INJURIES NUMBEA DE SCRIPT ON 8 10101 01 1
NA l
7 89 11 12 60 OFFSITE CONSEQUENCES hI NA l
7 89 80 LOSS OR DA4 AGE TO FACILITY TYPE DE SCRIPT ON
[J,j l
NA l
1 7 E9 10 80 O2130516 750326 PUBLICITY ADOCK 05000263 l
1 ~
l NA CF 7 09 go ADDITIONAL FACTORS
]l Cause Description (Cont'd) and repacked.
Tha valve. ras demonstrated to l
7 89 80 j
function properly prior to return to power operation following the outage.
7 89 80 M H Clarity 612-295-5151 NAME:
p4 mNE.
GPO $0h*$$T L
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3 M i~
e~ t g NORTHERN 5TATES POWER COMPANY MIN N E A PO L.S S. MI N N E S OTA 55401 2.\\ g.fu
,.,3 M
'.i' $L
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March 26,1975 S F" 5
-o Mr. A. Giambusso, Dprector6 9
~A Division of Reactor Licensing Y'?f)s s
U S Iuclear Regulatory Cocnission v.
Washington, D. C.
20555 Supplement to Licensee Event Report to the NRC RCIC Steamline Isolation Valve Failed to Close
Dear Mr. Giambusso:
1975 is An update to our previous Licensee Event Report dated January 9, reproduced on the back of this letter.
Yours very truly, DC M
poA L 0 Mayer, PE Manager of Nuclear Support Services LOM/yb cc:
J G Keppler G Charnoff Minne ota Pollution Control Agency h
Attn:
E A Prytina y
-s dJ14
-over-
.