ML13330A766
| ML13330A766 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/06/1979 |
| From: | Head J SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| NUDOCS 7910030887 | |
| Download: ML13330A766 (4) | |
Text
Sou*rn California Edison Companq P. 0. BOX00 2244 WALNUT GROVE AVENUE J. T. HEAD, JR.
ROSEMEAD, CALIFORNIA 91770 ELErHONE Septnber 6, 1979 U. S. Nuclear Regulatory Coraission Office of Inspection and Enforc.ent ashington, D.C.
20555 Attention:
Director, Division of Reactor Construction Inspection Docket No. 50-206 San Onofre Urit 1
Dear Sir:
IE Bulletin 79-15 Deep Draft PuL-Deficiencies Reference is made to correspoindence from Mir.
R. H. Engerken of USNRC, Region V, dated July 11, 1979 and July 18, 1979, fonvarding the subject IE Bulletin and directing that responses be suomitted to your office.
Responses to the individual items are listed bela,; in the order found in the Bulletin.
Itcn 1 "The numxber of deep draft punps similar to those shcow','n in Figures 1 and 2 utilized in safety related applications in each facility."
Rsn:
Six pamps similar to those shown in Figures 1 and 2 of IE Bulletin 79-15 are utilized in safety related application at San Onofre Unit 1.
Iton 2 "Manufacturer, indel, capacity and plant application."
Response
Number Plant Apolication.
Manufacturer Modxel Capacity 2
Salt Water Cocling Johnston Piup JX1243-44 4620 gpyn Co.
7910080 7 q
-u7/
- u. s.
NuAclear Reulatoy mu issionw Page 2 4
Diesel Fuel Oil Goulds Pups, V I T 38 gpn.
Transfer Inc.
Item 3 "Overall dimensions of pumps.".
Response
Length of Length Pump Dianeter Irreller Section Overall Salt Water Cooling 1.48' 2.33' 13.17' Diesel el Oil Transfer 0.563' 1.281' 16.74' Item 4 "Summary of startup, testing and routine maintenance history."
Response
The salt water cooling pimps were installed, tested, and placed in service in 1967.
They have operated.alrrost continuously since then with primary start rotation being made weekly.
Maintenance has consisted of packing adjustnents, bearing replacement and occasional overhauls.
Maintenance frequency has been as expected for puaps of this design and service.
The diesel fuel oil transfer puaps were installed, tested and placed in service in June of 1977.
They have operated intermittently since then without incident.
Frequency of opera tion is on the order of three times a month with a running duration of one minute to five minutes.
These pumps have required no corrective maintenance to date.
Mnthly inservice inspection testing requLres determination of the pump differential pressures.
Additionally, the flcw rates are re corded for the salt water. cooling puaps.
This testing has disclosed no irregularities in pmp performnce.
Item 5 "Qerational problems and major repair efforts."
Response
In March of 1975 the north salt water cooling peup experienced a broken punp shaft during normal plant operation. The south salt water cooling pump was started ad no operational difficulty was experienced.
The damaged pumxp was repaired and returned to service.
Item 6 "The. longest interval that each purp has been available for opera tion without correcLive maintenance.
Identify the number of cycles of operation during this interval, the duration of each cycle and the operating ade(s) (recirculation, rated flo., et Identify the longest continuous operation at or near rated flow conditions for each pump and the status of the pump operability at the end of the run."
U.
S.
Eiclear Regulatory.
Eusson Page 3
Response
Diesel North South Fuel Oil Salt Water Salt Water Transfer Cooling.
Cooling Pumrps Pumnos Pumps (All four)
Longest interval 45 months 39 ronths 26 months available for (date of operation without
. installa corrective.-
tion to Lenance.
present)
Number of cycles About 100 1bout 80 About 100 of operation during above inte:;r-val.
Duration of cycle Avg.
1 week Avg. 1 week Avg. 5 mins.
Operating made Approx. 75%
APprox. 75%
Rated f1c of rated flo~
of rated flcw.,
Longest continuous One month Two weeks About 30 operat -ion at or minutes near rated flcow.
Status of purop Fully Fully Fully operability at operable operable operable end of run.
Item "In addition licensees shall accumulate and make available for inspec tion at the licensees plant site the follc.ing information on the above indentified pumps.
- 1.
Drawings, sectional asseniblies and parts list.
- 2.
Detailed history of purp maintenance (alignent, parts replace ment, etc.) including bearing wear data, replacenent frequency and a conparison with the nanufacturer's rated life for wearing surfaces.
- 3.
Quality assurance and reliability testing req-uirements.
- 4.
Design specifications..
U. S. Nuclear Regulatory CmaIssio Page4
- 5.
Results of tests performed during operation.of prior to licensing.
- 6.
Details of the procedures used to align the pur.p colunn."
Re The additional ite:ms of information required for the above identified pups whiCh have been retained in accordance with the requirements in effect at the tine, have been accumulated and are available for inspetion at San Onofre Unit 1.
Item "For those cases nhere the maintenance or operating history of a particular panro indicates that the design specifications are not being et, initiate appropriate actions that will da-onstrate con formance to design reqirements.
Provide a description of planned actions within 60 days including a schedule for implei-entation of any actions that vwll not be completed within 120 days."
Resoonse:
In every case the raintenance and operating histories of these pups indicate that the design specifications are being met.
Item "In addition descrile any planned.or coirpleted tests involving long term operation of prototypes or punps of similar design, which demonstrate the long tem operability of such deep draft pupps at your facility."
Response
No tests involving long tem operation of prototypes or punps of similar design have been completed or are planned.
Should you have any questions concerning this-matter, please contact me.
Sincerely, cc:
P.
H. Tnge lken, Director, USIC R! gioin V