ML17252A892
| ML17252A892 | |
| Person / Time | |
|---|---|
| Site: | Indian Point  (DPR-026) |
| Issue date: | 09/06/1973 |
| From: | Cobean W Con Edison, Consolidated Edison Co of New York |
| To: | O'Leary J US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17252A892 (2) | |
Text
Regulatory Dodrnt Fire Mr. John F. O'Leary, Director Directorate of Licensing U. s. Atomic Energy Commission Washington, D. c.
20545
Dear Mr. O'Leary:
50-247 September 6, 1973 The following report of Abnormal Occurrence No.
3-2~11 is pro-vided pursuant to the requirements of Section 6.12.2(a) of the Technical Specifications to Facility Operating License No. DPR-26.
On.~August 22, 1973, it was discovered that the instrument set-ting of one of the four channels of.the low steam line press-sure controllers in the high steam flow safety circuit was below that required by Table 3-1, No. 5.
The setting was found to be 577 psig rather than the required 600 psig or greater.
The anomaly was identified during the performance of Periodic Sur-veillance Test PT-Mll, "Steam Line Pressure Analog Channel Func-tional Test".
Unit No. 2 was operating at approximately 49%
power at the time.
The discrepancy is believed to have resulted from instrument drift.
To correct the situation, the channel was recalibrated and retested satisfactorily.
There are no safety implications associated with this.' occurrence since the three remaining channels in the low steam line pressure circuit weuld have produced the required protective action.
The logic involved with this circuit requires actu~tion if two of four controllers sense low pressure.
881 6
I/.
-~
. Mr. John F. O'Le.
2 -
~eptember 6, 1973
,.i).,
.~*,.,._
- The Station Nuclear Safety Committee arid the Chairman of the Company's Nuclear Facilities Safety Committee have reviewed the above described occurrence and ha~e approved the correc-tive action taken.
TML/mo cc/ Mr. James P. O'Reilly Regulatory Operations, U.S.A.E.C.
LV~ R_~k_~
Warren R. Cobean, Jr.
Manager - Nuclear Power Generation Department