ML19209A412
| ML19209A412 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 09/10/1979 |
| From: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| IEB-79-15, NUDOCS 7910030809 | |
| Download: ML19209A412 (3) | |
Text
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Power g%/ Company
- 0) hr General Offices: 212 West M6ce.. gen Avenue. Jackson. Michigan 49201
- Area Code 517 788-OSSO 4
Septembe. 10, 1979 Director, Office of Inspection and Enforcement Att Director, Division of Reactor Construction Inspection US Nuclear Regulatory Co==ission Washington, DC 20555 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT - RESPONSE TO IE BULLETIN 79-15: DEEP DRAFT PUMP DEFICIENCIES The subject bulletin was forwarded by NRC letter dated July 11, 1979 It re-ported internal deficiencies found by another licensee in new deep draft pu=ps and that similar deficiencies had previously been identified in other pumps of this design. Consumers Power Company was requested to provide specific infor-mation regarding applications of deep draft pumps at Big Rock Point. This infor=ation is provided below.
Consumers Power Co=pany's review of deep draft pu=p performance was concen-trated on those pu=ps which are safety related and would be relied upon to perform core cooling related functions following an accident. The information presented below applies to the pu=p only, excluding the driver, since the de-ficiencies identified in the subject bulletin did not address drivers.
It should be noted that the pumps at Big Rock Point are considerably older than those discussed in the subject bulletin (Big Rock Point pumps were manufactured in 1959) and were not manufactured by any of the ec=panies listed in the subject bulletin.
The requested information regarding deep draft pu=ps at Big Rock Point is as follows:
Item 1 The number of deep draft pumps similar to those shown in Figures 1 and 2 (of the bulletin) utilized in safety-related applications in each facility.
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Resuonse Four such pu=ps are used in safety-related applications:
An electric motor-driven fire pump, a diesel-driven fire pump, and two core spray pumps.
The fire pu=ps are the source of water for the low-pressure emergemy core cooling sprays and the core spray pu=ps provide for recirculation of water from the containment enclosure through the core sprays for long-tern cooling.
SEP 13 W%
2 9
Item 2 Manufacturer, model, capacity and plant application.
Response
Electric Fire Pu=p: Worthington, Type 12QFO h, 1000 Gpm Diesel Fire Pu=p:
Worthington, Type 12?J0 I,1000 Gpm t
Core Spray Pu=ps:
Wintroath, Div of Worthington, Type 8M-23, h00 Gpm Item 3 Overall dimensions of pu=ps.
Response
Electric Fire Pu=p: Suction Connection
- 8" Discharge Connection
- 10" Dimension From Base to Bottom Strainer - 15'6-3/h" Weight
- 1,610 Lb Diesel Fire Pump:
Suction Connection
- 8" Discharge Connection
- 10" Dimension Frem Base to Suction Lip
- 15'11-1/8" Veight
- 1,6h0 Lb Core Spray P.aps:
Suction Connection h"
Discharge Connection h"
Dimension From Base to Bottom of Barrel L'0" Weight
- 560 Lb Item h Surmnry of startup, testing and reutine maintenance.
Response
Start-Up: Core Spre; - Acceptanc s Test 30a, Tested 5/16/62, Accepted by A G B4;nop, Start-Up Engineer-Bechtel.
Fire Pu=ps - Acceptance Test 16, Tested 10/3/62, Accepted by A G Bishop.
Testing:
Diesel Fire Pu=p - Weekly, run 1/2 heur to warm diesel, record starting pressure and time to reach full deadhead pressure (Surveillance Test TT-20 started 6/22/77).
Electric Fire Pump - Started two times each month to test load emergency diesel generator (Surveillance Test TT-01 started h/12/7h).
1086 261
3 Diesel and Electric Fire Pu=ps - Each refueling outage, electric run long enough for test, diesel run 1/2 hour, record suction pressure, dis-charge pressure, pitot pressure at various flow conditions (no flov, one hose stream, two hose strea=s, three hose streams), flow at various flow conditions (Surveillance Test TR-70 started h/28/78).
Core Spray Pumps - Each refueling outage, run 15 minutes each pu=p, record discharge pressure, cavitation (Surveillance Test TR-05 started 7/9/Th).
Item 5 Operational problets and major repair efforts.
Response
There has been no major maintenance perfor=ed on any of these pu=ps, and no operational difficulty has been reported.
This was confirmed by examining the Weekly Operational Reports from 1962 to the present, and by personal discussion with the individual who was Maintenance Supervisor at Big Rock Point from the time of initial plant operation until his retirement in 1976.
Item 6 The longest interval that each pump has been available for operation without corrective maintenance.
Identify the nu=ber of cycles of operation during this interval, the duration of each cycle and the operating mode (s) (recirculation, rated flow, etc).
Identify the longest continuous operation at or near rated flow conditions for each pu=p and the status of the pu=p operability at the end of the run.
Resnonse All pu=ps have been operable since start-up in 1962. As noted above, no major maintenance has ever been performed on any of these pumps.
Number of cycl':s, duration and operating code:
It is impossible to say exactly hov =any times sach pu=p was run, for hov long and what mode.
The records kept go back to 1973; there is no record of testing before then.
All pumps have run only in the testing condition, and for less than two hours continuously.
All pu=ps were operable at the end of each run.
David A Bixel (Signed) 1086
?l52 David A Bixel Nuclear Licensing Administrator CC Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement Director, NRC Region III