ML19210A199
| ML19210A199 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/22/1975 |
| From: | Colitz J METROPOLITAN EDISON CO. |
| To: | |
| Shared Package | |
| ML19210A196 | List: |
| References | |
| NUDOCS 7910240919 | |
| Download: ML19210A199 (1) | |
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METC' OLITAN EDlSON COMPANY suessoraavor aweast rueucununts TELEPHONE 717 944.4.M1 M100LETOWN.PENNSYt.VANIA T7057 POSTOFf ICE GOX 480 July 22,1975 b
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Mr. J.P. O'Reilly, Director Directorate of Regulatory Region I 631 Park Avenue King of Prussia. Pa.
19406 Operating License DPR-50 Eacket 50-289
Subject:
Abnorinal Occurrence No A0 75-25
Dear Mr. O'Reilly:
This telegram is to confim the conversatibn between ftr. A.N; Fasano (Decion J-NRC) and J.J. Colitz (TMI Unit 1 Superintendent) at 0830 hours0.00961 days <br />0.231 hours <br />0.00137 weeks <br />3.15815e-4 months <br /> 22 July 1975.
The fo11cwing report is submitted in accordance with paragraph 6.7.2.a.4 (page 6-11) of the Technical Specifications.
On 21 July. ene of the three frequency relays for the A Diesel Generator was found to be in the " dropped out" state while the Cther two free,cency relays The Diesel Generator was operating at approxicately GC0 J7M were " picked up."
The Diesel (60 cycles /second) at the time this relay condition was observed.
Generator had been started and loaded for a short period cf thm for testing.
The frequency relays serve as an interlock which only allows the breiker to close when the Utesc1 C-enerator is up to speed. The frequency reicys are connected in a two-out-of-three logic thus any one relay failuro *4111 not For this reason. it was detarminea that prevent the breaker from closing.
the A Diesel Generator was operable.
The l
The relay was removed from service and replaced with another relay.
The suspect relay was tested and fcand to operate at the correct f I
functioned correctly.
Additional investigation will be snade to deterraine the cause for the relay 1
not being in the correct state.
Very truly yours, i
W J.J. Colitz unit i soperintenden
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0910240 /
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