ML20086J218
| ML20086J218 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/20/1974 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20086J217 | List: |
| References | |
| AO-74-25, NUDOCS 8401230325 | |
| Download: ML20086J218 (1) | |
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- (And s b d f./P E h FMW.DEPHIA EECTRIC CONFANY P M b Bottom Atomic Power Station og /S*- 3 M * /S*
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y November 20, 1974 Mr. James P. O'Reilly, Director United States Atomic Energy Commaission Directorate of Reguistory Operations 631 Park Avenue King of Prussia, Pennsylvania 19406
~~ Mso M OccurrAEca 24-HAur Notiffia d a Subject A
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Confirming R. 5. Fleisci-ann's conversation with Mr. Malt Baunack, A.E.C. Ragion 1 Segulatory Operations Office on November 20, 1974.
Raftrance License Number DPR-56 Technical Specification Reference Table 4.2.R Report No.:
50-278-74-25 Report Date November 20, 1974 Occurrence Deter November 19, 1974 Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta Pennsylvania 17314 Identification of Occurrence:
Failure of a torus high water level switch LS-3-23-91A to operate.
This switch operates to sway the HPCI suction from the condensate storage tank to the suppression pool.
1 Conditions Prior to Occurrence Unit 3 at greater than 90% power.
Description of Occurrence:
During a routine instrument surveillance test, LS-3-23-91A failed to operate Designation of Apparent Cause of Occurrence:
The switch assembly flapper arm was found to interfere slightly with the switch cru Analysis of Occurrences L5-3-23-91A and LS-3-23-915 condensate storage tenk to tha suppression pool. operate independently to sway the HFC j
LS-3-23-918 had just been tested and found to. function properly.
Because the failure of LS-3-23-91A to operate would not have interfered with the proper operation of the system, the safety implications are minimal.
Corrective Action:
4 The switch was readjusted to allow proper operation of the switch.
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cynled a nsamber of timas using water to lif t the float to ensure reliable"4tch was The sw and them rechecked using the appropriate itstrument surveillance test. U Qoferation Failure Data No previous failures on this type of switch.
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Very truly yours,
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6 W. T. Ullrich, Superintendent Q
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l Peach Bottom Atomic Power Station l
8401230325 741129 PDR ADOCK 05000270 S
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