ML19317G321
| ML19317G321 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/08/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19317G322 | List: |
| References | |
| CS-77-100, NUDOCS 8002280930 | |
| Download: ML19317G321 (2) | |
Text
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lE RLE COPYt Florida 8 June 1977 6.a Il NWer 3-0-3-a-3 c oa'a a moa CS-77-100
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t Mr. Norman C. Moseley, Director Docket No. 50-302 Office of Inspection & Enforcemnt' License No. DPR-72 U.S. Nuclear Regulatory Commi ;sion Licensee Event Report 77-37 230 Peachtree St.
N.W.,
Suite 818 Atlanta, Georgia 30303
Dear Mr. Moseley:
Our Corrective Action, as noted on the referenced Licensee Event Report Supple-mentary Information, has been evaluated subsequent to discussions with your office. As a result of this evaluation we have instigated an intensive program to assure that the Steam Driven Emergency Feedwater Pump will automatically start on thin Steam supply. We wish to amplify the Corrective Actions we have taken.
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On 27 May 1977 it was decided that EFP-2 would be operated on main steam in the recirculation mode continuously until it could be declared operable based on repairs or adjustments.
On 31 May 1977 under the direction of a factory representative, certain repairs, including adjustments and replacement parts, were made and a procedure change i
which involved control bleed valve adjustments was initiated.
He pump was de-clared operable after five consecutive, successful starts on main steam.
On 2 June 1977 the air control valve was repaired and an air assist line test assembly employing a toggle switch controlled solenoid was utilized.
In addition, the oil was changed from 10 W to 5 W-20.
The pump was again declared operable after three successful starts on main steam.
On 6 June 1977 the pump again tripped on over-speed. He previously installed air assist line was again used and three test starts declared the pump operable.
On 7 June 1977 it was determined that when hot, the pump would not fail to start successfully; therefore, it was decided to run the pump one hour in each four.
On the first attempt it failed to start and the action statement was entered.
On 8 June 1977 the pump was placed in recirculation mode to be run continuously on main steam until the factory representative returns on 9 June 1977 with a replacement governor which is expected to resolve the problem.
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, O V In sununary, when question has existed as to the operability of the Steam Driven Emergency Feedwater Pump with regard to over-speed tripping when starting, it has been declared operable by continuously operating in the recirculation mode with Main Steam supplying power.
The pump has been operable during the entire period in question when manually operated on Main Steam. Therefore, the safety of the plant is considered not to have been jeopardized.
It is concluded in Section 14.2.2.8.3. a of the FS AR that the restoration of auxiliary feedwater flow is not required before fifteen minutes after the postulated failure to assure' core coverage with subcooled cool-ant.
Flow can be established manually well within this time frame.
If you have any questions on this subject, please contact us.
Very truly yours, FLOBIDA POWER CORPORATION O s 0.
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W. P. Stewart f.
Director, Power Production DWP/rc Nuclear Plant Manager I
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