ML19273B398
| ML19273B398 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 03/12/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Stewart W FLORIDA POWER CORP. |
| References | |
| TAC-07125, TAC-7125, NUDOCS 7904060232 | |
| Download: ML19273B398 (3) | |
Text
,
n asog
[e UNITED STATES g*
7; NUCLEAR REGULATORY COMMISSION 7
j WASHINGTON, D.C 20655 o c 'f e
.( u,4 /
March 12, 1979
....+
- n
[
Docket No. 50-302 q
Mr. W. P. Stewart Director, Power Production Florida Power Corporation P. O. Box 14042, Mail Stop C-4 St. Petersburg, Florida 33733
Dear Mr. Stewart:
Condition 2.C.(7) of the Crystal River Unit No. 3 (CR 3)
Operating License (DPR-72) requires that you modify, to the satisfaction of the Conmission, the reactor coolant system flow indication to meet the single failure criterion with regard to pressure sensing lines to the. flow diff-erential pressure transmitters.
By letter dated October 28, 1977 you provided a single failure evaluation of the subject sensing lines and pro-posed instrumentation that would alarm in the event of sensing line blockage.
It is our understanding that you do not intend to qualify this instrumentation as is re-quired for the reactor protection system.
Furthermore you did not propose Technical Specification operability and sur-veillance requirements for this instrumentation.
It is our position that a satisfactory modification to tte RC flow sensing system, for single failure considerations, would be the installation of a redundant set of sensing lines (one high pressure and one low pressure) for each reactor coolant loop. These sensing lines would serve two of the four existing differential pressure transmitters and should connect to the existing sensing lines immediately downstream of the first root valve off the reactor coolant loop. The piping run of the new sensing lines should be physically sep-arated from the existing lines.
You are requested to inform us within ten days from the date of this letter whether you intend to pursue your proposed mod-ification, installation of additional sensing lines as discussed 73040so#32 i
Mr. W. P. Stewart above or some other means of addressing the license condition.
Sincerely, r
,)m hi O-<.
Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc:
See next page G
Florida Power Corporation cc: Mr. 5. A. Brandimore Vice President and General Counsel P. O. Box 14042 St. Petersburg, Florida 33733 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Crystal River Public Library Crystal River, Florida 32629
'