ML20054E630
| ML20054E630 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 06/07/1982 |
| From: | Lentine F COMMONWEALTH EDISON CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| 4274N, NUDOCS 8206140008 | |
| Download: ML20054E630 (1) | |
Text
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N Commonwealth Edison I
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'/ One Fust Nation"I Ptaz2, Chicrgo. Illinois
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Addrns Reply 13: P:st Offica Box 767 Chicago. Illinois 60690 Jun e 7, 1982 Mr. Darrell G. Eisenhut, Director Division o f Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Zion Station Unit 1 Steam Generator Inspection and Repair NRC Docket No. 50-295 Reference (a):
Ma y 17, 1982, letter from F. Lentine to D. G. Eisenhut.
Dear Mr. Eisenhut:
This is to provide clarification to the discussion of the incore instrumentation tubing contained in Appendix C to reference (a).
This information was requested by your staff in a telecon on Jun e 3, 1982.
The incore instrumentation system consists of 58 incore thimble tubes with six detectors ( A through F).
Each detector is used to scan nine or ten o f the thimbles and all are normally cali-brated in a single thimble,. installed for the purpose.
If the use of the calibration thimble is lost, each detector can be inserted in any o f the ten "C" detector thimbles.
Therefore, there are ten alternative thimbles that can be used for calibration.
Please address any questions regardin'g this matter to this o f fice.
Very truly yours, jj $$a F. G. Lentine Nuclear Licensing Administrator 1m 0\\
0 4274N I
8206140008 820607 PDR ADOCK 05000295 P