ML17037C251

From kanterella
Revision as of 20:59, 4 February 2020 by StriderTol (talk | contribs) (Created page by program invented by StriderTol)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Letter Regarding Letters Dated November 28 and December 3, 1973 Reporting Failures of Eleven and Fifteen Control Rods to Insert to Position Oo Following a Reactor Scram and Confirming That a More Complete Report Will Be ...
ML17037C251
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 12/18/1973
From: Skovholt D
US Atomic Energy Commission (AEC)
To: Schneider R
Niagara Mohawk Power Corp
References
Download: ML17037C251 (4)


Text

QQQ 1 v j373 Docket Ho. 50-220 Hiagara Mohawk Power Corporation ATTki: Mr. Rudolph R. Schneider Vice President Electric Operations 300 Erie Boulevard Vest Syracuse, Hew York 13202 Gentlemen:

Your letters dated Hovember 28 and December 3, 1973, reported, as abnormal occurrences, the. failures of eleven (11) and fifteen (15),

respectively, contxol rods to insert to position 00 following a reactor scram. The control rods inserted to position 02 (six inches from, full insertion) with the scram and were subsequently inserted to position 00 using normal contxol rod drive system pressure under manual control. You indicate in both reports that corrective action involving overhaul of the control rods will be done during the spring 1974 refueling outage.

Discussions regarding the occurrences have been held by telephone between T. J. Perkins of your staff and D. L. Ziemann and C. J. DeBevec of my staff. Additional clarifying information is necessary to describe the apparent cause of these occurrences as regards deterioration of the stop piston seals and the detaHs of your review and analysis on which you concluded that the event does not significantly affect safety of operation at Mne N.le Point Unit 1. In our discussions, Hr. T. J.

Perkins indicated a more complete report would be provided within ten days; this letter is to confirm that commitment.

Sincerely,

,Donald J. Skovholt Assistant Director for Operating Reactors Directorate of Licensing cc: See next page

0 W

l

Niagara Mohawk Power Corporation - 2 OEC 3.8 1973 CC4 J. Bruce NacDonald, Esquire Deputy Commissioner and Counsel Hew York State Department of Commerce and Counsel to the Atomic Energy Council'9 Washington Avenue Albany, Hew York 12210 Arvin E. Upton, Esquire LeBoeuf, Lamb, Leiby 6 IfacRae 1757 H Street,'. M.

Washington, D. C. 20036 Dr. Qilliam Seymour w/cy of NMP ltrs dtd ll/28/73 6 12/3/73 Staff Coordinator Hew York State Atomic L'nergy Council Hew York State Department of Connnerce 112 State Street Albany, Hew York 12207 Oswego City Library 120 E. Second Street Oswego, Hew York 13126 Dis tribution H)ocket Pile AEC PDR Local PDR RP Reading Branch Reading DJSkovholt, L:OR TJCaxter, L:OR ACRS (16)

RO (3)

OGC DLZiemann, L:ORB //2 CJDeBevec, L:ORB f12 198)iggs, L:ORB //2 SHanauer OPPICC3P'7403 L:ORB f/ L:0- ----"-----"

II2 .

~N'""'"

L:ORB II """ L:OR, IIUIINAMCW CJDeBe c:sj 2.gg.............,DLzgq..ago, ....... DJSko..

DATC+ ,.12./18L7.3...., 73.,13?..j(/73,------..., olt......'12Jl8/?3?2l/A Forgn hEC-318 (Rev. 9 S3) hECM 0240 OPO C43 IO el@00 I 520 28

F 1

1, 11 1

e, F

/

h 1