ML20058L126
| ML20058L126 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 01/20/1975 |
| From: | Larson C NORTHERN STATES POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 9105080325 | |
| Download: ML20058L126 (1) | |
Text
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4 e NOMTHERN STATES
,P O W E R COMPANY Monticello, Minnesota 55362
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January 20, 1975
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im Mr. J. G. reppler, Pagional Director N #
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.-I Directorate of Regulatory Operaticus S
Region III p 'ss
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linited States Atomic Energy O.m.ission L
. ihpy.dN 799 Roosevelt Road 7^
6-Glen Ellyn, Illinois 61073 K; C, w'.
iy Daar Mr. Keppler:
KNTICE110 LAX 1DLR GDERATD4G PIANT Ibcket ?b. 50 263 License No. DPR-22 i
on January 19, 1975, Wile perfoming the Weekly Refueling Interlock Surveillance Test, a Rod h'ithdrawal Block was not received den the refueling bridge was over che core and the reactor mode switch was placed in the Starny position.
Investigation revealed that the ' actuating arm of the limit switch Wich opens een the bridge is over the core, had cane loose freci the limit switch shaft, causing it to be out of adjustraent. '!he limit switch was
?roperly adjusted and the actuating am set screw was retightened using hTite on the threads.
Yours very truly, C,f,o2,% /4 g
C. E. Larson Plant 14anager l
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B G Case, Directorate of Licensin:t cc:
G 01arnoff i
Minnesota Pollutim Control 4;en f 4
Attn: E A Pryzina File
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Copies sent uf telecopict to Y.eppler an'd Case.
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