ML17252A877
| ML17252A877 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  (DPR-026) |
| Issue date: | 12/18/1973 |
| From: | Cobean W Con Edison, Consolidated Edison Co of New York |
| To: | O'Reilly J US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17252A877 (2) | |
Text
- \\~.
- .. Mr *. Jam~s P. O'Reilly, Direct01.~
Reg~latory *operations, Region I
- u. s. Atomic Energy. Commissi~n 631 ~ark Avenue
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.. ;.. ~... ' :.
.. December lB, 1973 Re:.. Indian Point Unit No. 2 Facility Op~rating License DPR-26 A.O. 3-2-17 king of Prussia, ~ennsylvania i9406
Dear Mr. O'Reilly,
The following report of Abnorm~l* Oocur1:ence No. 3-2-17 is
'Provided pursuant to the requireme~te* of Section G.12.2(a) of the T~ohnioal Specifications to Facility Operating License No.
PPR-.26.
On Decemb.~r 17 1 1973 an analysis of the results of periodic tests and calibration checks relating to pressurizer level in-dica~ed that the setting for one of three biatables associated
ith high pressux:-izer level reactor trip wa15 slightly above thr.tt
- required by Teclinical Specificatjon 2.3.1.C(l).
At the time of the1_3e periodic tests and calibration c.heoks, the reactor was in the cold shutdown condition for maintenance work associated with repairs to the feedwater piping for No. 22 steam generator*.
- ~lis particular bistable device is part of a tw6 out of ;three logic system which provides for *a reactor trif.' signal on high pres-su~i~er level.
The setpoirit was found to be at 92.25% cif span in-.
stead of the 'S. 92~ of span required by the Technical Specifications.
The other two bistables of the system were found to be operating correctly.
The chahnel associated with this device was recalibrated and ~etested satisfactorily4.
,w, believ~ the observed discrepancy to be th~ result of in*
strument drift and have requested. our Engineering Department to provide a detailed analyses of the capability of the instrument buses.to sustain the applied loading and th~ harmonic wave effect on power supplies, bistables, converters etc.
As part of the annly-
. ses, the effect of voltage swings on the equipment listed above
~..
,. ;:.*\\~::.~;:~iii,~~~~i?:::~§;::~,('~~/yi~l.;~\\,i):*e:~;,~~;if'/:'.~'.*:5:;:~~~~:. i::-~... *;.. :!* *.,. **/_:.;
Mr~ James P. O'Reilly 2 -
.December 19,
- 1973
- *
- Re:
- Indian Point Unit No. 2
=. Facility Operating License I>PR--26 A.O. 3-2-17
- .will be evaluatad.
Based on these analy'ses, appropriate cor-rective action will be taken.
Mr. Dert Davis of your office was notified of this occurrence by Mr. Johri Makepeace by tele-phone on December 17, 1973.
cc:
Mr. John F. O'Leary J
/
/
Very truly yours,
. U!)uh,\\J,11. 12{~,~~":
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Warren *R. Cobean, Jr *., J..!anager Nuclear Power Generation