IR 05000249/1972013
| ML17252B022 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 09/25/1972 |
| From: | Dance H C 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 ' ( Nitv'"""L.....---
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 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 of line failur 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 requirement ... REGUIATORY OPERATIONS REGION III RO Inquiry Report No. : 050-249/72-13Q Transmittal September 25, 1972 Distribution:
RO Chief, Reactor Test and Operations Branch RO:HQ (5) DR Central Files Regulatory Standards (3) Licensing (13) PDR Local PDR NSIC DTIE, OR ..
. * *-.. REC"D &
9-27-72 Muller, H. Denton, Tedesco, Docket file ** 50-249 to the Vollmer, following Boyd (2) Hendrie; Operational Skovhoft (2) Safety Br.*