ML19339C725
| ML19339C725 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 10/27/1980 |
| From: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-80-18, NUDOCS 8011190201 | |
| Download: ML19339C725 (1) | |
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SACRAMENTO MUNICIPAL UTILITY District O 6201 s street. Ben 15a30. sacramento. cahfornia 95813. (916) 452 3211 October 27, 1980
^.i Mr. R. H. Engelken, Director Region V, Office of Inspection and Enforcement U.S. fluclear Regulatory Commission $3 2 U 1 5 !I Suite 202, Walnut Creek Plaza 1990 florth California Boulevard Walnut Creek, California 94596
- iEE3 VICES
" ' :;Ch Docket 50-312 Rancho Seco fluclear Generating Station, Unit flo.1 IE Bulletin 80-18 Maintenance of Adequate Minimum Flow Through Centrifugal Charging Pumps
Dear Mr. Engelken:
The District has reviewed the high pressure injection system at Rancho Seco and has performed the calculations outlined in IE Bulletin 80-18.
These calculations showed that both high pressure injection pumps can be operated continuously with reactor coolant system pressure at the set-point of the pressurizer safety valves without damaging the pumps. With the " weak" pump maintaining 80 gpm (minimum flow for 4200 seconds) the HPI system will be capable of producing in excess of 2700 psig while the reactor coolant system will be at 2525 psig.
fio corrective action is required.
Twenty-five man-days were required to complete the actions required by this bulletin.
Sincerely, b
fn.sb ~C dJohnJ[Mattimoe Assistant General Manager and Chief Engineer cc: NRC Office of Inspection
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