ML20023B186
| ML20023B186 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 12/17/1982 |
| From: | Fay C WISCONSIN ELECTRIC POWER CO. |
| To: | Clark R, Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| TASK-2.B.1, TASK-TM TAC-53345, TAC-53346, NUDOCS 8212270125 | |
| Download: ML20023B186 (2) | |
Text
insconsin EAecincmeacmn 231 W. MICHIGAN. P.O. BOX 2046, MILWAUMEE, E 53201 December 17, 1982 Mr. H.
R. Denton, Director Office of Nuclear Reactor Regulation U. S. NUCLEAR REGULATORY COMMISSION Washington, D. C.
20555 Attention:
Mr. R. A. Clark, Chief Operating Reactors Branch 3 Gentlemen:
DOCKET NO. 50-266 REACTOR COOLANT SYSTEM GAS /ENT SYSTEM POINT BEACH NUCLEAR PLANT, UNIT 1 In a letter dated June 18, 1982, Wisconsin Electric Power Company requested an exemption from the schedular require-monts of 10 CFR 50.44 (c) (3) (iii) to permit a delayed installation of the reactor coolant system gas vent system (RCSGVS) for the Point Beach Nuclear Plant Unit 1.
We noted in that request that although the RCSGVS piping and valving would be installed in Unit 1 during the fall 1982 refueling outage and in Unit 2 during the spring 1983 refueling outage, the equipment necessary to perinit complete remote operation of each RCSGVS would not be avai]able.
During the just completed Unit 1 refueling cutage we have installed the piping and valving for the Unit 1 RCSGVS.
As discusscd with Mr. Colburn and others on your staff during a telephone conversation on December 2, 1982, several minor modifica-tions to the as-designed piping and piping supports were necessary during installation of this system to accommodate interferences from ozher components and systems in containment.
The revised system (as-built isometric) drawings were provided to the vendor, Combustion Engineering Power Systems (C-E), to verify that these modifications did not alter the results of the thermal-hydraulic and ucismic stress analyses of the RCSGVS.
C-E has concluded that the modifications would result in only minor differences from the design version of the RCSGVS as shown in the stress report.
An addendum to the stress report for the minor differences resulting from the modifications will be provided to Wisconsin Electric by about December 30, 1982.,
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d Mr. H. R. Denton December 17, 1982 As further discussed during the December 2 telephone call, we have demonstrated the ability to remotely operate the RCSGVS using a temporary power supply to a temporary control panel.
However, we have returned Point Beach Unit 1 to operation with the RCSGVS operable but secured; that is, all manual isolation valves open but with the six remotely operated solenoid valves shut and power removed from the temporary control panel.
This provides for a series-parallel isolation of the RCSGVS system in accordance with the system design.
However, the system is capable of being operated in an emergency with the restoration of temporary power provided approved procedures are available.
The system for Unit 2 will be in a similar configuration following the spring 19E3 refueling.
Full operabi.lity of both units' systens will be achieved after the installation of the new instrumentation panels in the control room and completion of the bus upgrade work in progress.
This is not expected to be complete until mid-1983.
Accordingly, we do not consider that an exemption to the requirements of 10 CFR 50.44 is necessary.
We do, however, desire your review of our system configuration and concurrence with our conclusion.
Very truly yours, a v'h
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Assistant Vica President C. W. Fay Copy to NRC Resident Inspector t
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