ML17252B022
| ML17252B022 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 09/25/1972 |
| From: | Dance H US Atomic Energy Commission (AEC) |
| To: | Commonwealth Edison Co |
| References | |
| IR 1972013Q | |
| Download: ML17252B022 (2) | |
Text
- Qr-i U. S. ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS REGION III RO Inquiry Report No. 050-249/72-13Q
Subject:
Commonwealth Edison Company License No. DPR-25 Dresden Unit 3 Isolation Condenser High Flow Switch Out of Calibration Prepared By:
H. C. Dance
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A.
Date and Manner AEC was Informed:
B.
RO:III was informed by T. Watts, Operating Engineer, via telephone on September 25, 1972.
Description of Particular Event or Circumstance:
During,quarterly surveillance testing the isolation condenser IC) high stea.~. and high condensate flow switches were found tci be out of calibration as shown below.
Circuit As Left*Setting High steam flow 417 + 3 inches High condensate flow 30 + 1 inch As Found Setting Tech Spec 426.5", 435.O"
<425 inches 33.3",
33.5" 32 inches
~
These switches initiate closure of the IC isolation valves in ~vent of line failure.
C.
Action by Licensee:
The licensee reset the. switches to the as-left setting shown above when the condition was found.
After data was reviewed, it was decided that future settings would be left at 400 +/- 5 inches for steam flow and 28.5 +/-one inch for condensate flow.
The licensee intends to report this occurrence in accordance with license requirements.
REGUIATORY OPERATIONS REGION III RO Inquiry Report No. :
050-249/72-13Q Transmittal Dat~:
September 25, 1972 Distribution:
RO Chief, Reactor Test and Operations Branch RO:HQ (5)
DR Central Files Regulatory Standards (3)
Licensing (13)
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- REC"D DISTRI~.UTED 9-27-72
- Muller, H.
- Denton, Tedesco, Docket file ** 50-249 to the
- Vollmer, following Boyd (2)
Hendrie; Operational Skovhoft (2)
Safety Br.*