ML20127L308
| ML20127L308 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 08/05/1975 |
| From: | Day B, Mayer L NORTHERN STATES POWER CO. |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| References | |
| LER-LER-750805, NUDOCS 9211230489 | |
| Download: ML20127L308 (2) | |
Text
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NORTHERN STATES POWEhCOMPANY
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August 4 1975
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Mr. A. Giambusso, Director Q
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U. S. Nuclear Regulatory Comission
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Washington, DC 20555
Dear Mr. Giambusso:
MONTICELLO NUCLEAR GENERATING PIANT Docket No. 50-263 License No. DPR-22 Licensee Event Report to the NRC Inoperable Torus Cooling Injection Valve The Licensee Event Report for this occurrence is reproduced on the back of this letter.
Yours very truly, c),
Manager, Nuclear Support Services
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LICENSEE EVENT REPORT CONTROL BLOCK:(
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l (PLEAM PAINT All REGUIRED INFORM ATtDN) 1 6
(CEN$tt L CE NSI (VI NT NAME LCENSE NUMBf R T YPt TYPI
-@B is IN la IN le i 11 l Ol 01-10 lo Io lo_l o I-In I nl Ic li li li_ Lt_i inIiI 7 99 14 15 25 26 30 31 32
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DOCKET NUMBER EVENT DATE REPORT Datt CATEGC4Y 01 CON 7 l P l (j
[T_j M l0I SI 0l-l 0l 2l6 l3 l 1017l2l7l7l1l lol8lolSI7I5l T
7 0 57 EB 59 60 61 68 69 74 7b 80 EVENT DESCRIPTION 99 IDuring test RHR torus cooling iniection valve Mo 2008 operator motor f ailed due to I
80 7 89 nccurrenco!
$ l stalled rotor current. Unstrean isointion vnive Mn ?nn6 nnnrnhin nt tten nf 80 7 89 h (Two previous similar occurrences reported. Affected part repaired. Component modifi-)
80 7 89 h Ications in proeress(Ao 261/75-13 )
80 7 89 I
EE i 80 7 89 ns
$ysTE M CAUSE COM8W N1 COM80NtNT Coot CODE COM8)CNf NT CODE Spit t p MANUF ACTU64 R VtXA T ON E is !8 i LU I vlA It lv lo i rl Lt_1 in 1 I, la I Lu.J 3
7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION Q lA Rotork Model 70A valve operator motor stalled because limit switches failed to l
BO 7 89 I
BE lde-energize motor windings at prescribed noint in valve onenine trnvn1-14mir cuitch 00 7 89 l
H lsrenn4nt am.inr4nm cm.,cma u. 1 _ cc-e _ mu mm4mm <., u,, c - e m me,rm m. 4 -
80 7 89
. ETHOO OF M
F ACUT y STATUS
% POW E A OTHER STATUS DISCOVEHy DiSCOviny DE SCfwP f 40N l
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l N/A 1
7 8 9
10 12 13 44 45 46 80 FOnu OF RELE SED OF EL SE AM OUN T Of ACTNITY LOCAT3ON OF 9ELLASE I
N /A l,,7_)
N/A 1
7 8 9
10 11 44 45 80 PERSONNEL EXPOSURES NUM0tR TYPf DESCRiPT'CN 81010 I o l trJ l
N/A
_,l 80 7 89 11 12 13 PERSONNEL INJURIES NUMi1EA DESCRIPTION l
N lo 10 I o l I
N /A 80 7 89 11 12 OFFSITE CONSEQUENCES Ql N/A l
OO 7 89 LOSS OR DAMAGE TO FACILITY TYPE DE SCniPT ON
.l QWl N/A 80 7 80 10 PUBLICITY M l N/A
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j 80 7 80 ADDITIONAL FACTORS Q [Cause Description (cont'd) valve' operation.
Stem clamp loose because stem clamp l
80 7 89 I
Iset nerew shenred.
tarcer ser nereus inntn11nd.
eO 7 89 I
NAME:
Bvr(
D. Day
/ HONE: (612) 295-5151 GF 0 nat.467
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