ML19290B876
| ML19290B876 | |
| Person / Time | |
|---|---|
| Site: | FitzPatrick  |
| Issue date: | 10/31/1979 |
| From: | Leonard J POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-79-24, NUDOCS 7912140298 | |
| Download: ML19290B876 (3) | |
Text
't. 1.
- 1 POWER AUTHORITY OF THE STATE OF NEW YORK J AMES A. FIT 2 PATRICK NUCLEAR POWER PLANT i
JOHN D. LEONARD, JR.
P.O. Box 41 Resident Manager CCtober 31, 1979 Lycommg, New York 13093 JAFP 600 31mE384o Mr. Boyce H. Grier, Director United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, PA 19406
SUBJECT:
NRC I & E BULLETIN NO. 79-24 FR0 ZEN LINES near Mr. Grier:
The FitzPatrick Plant staff reviewed all process, instrument and sample lines that are safety related. The staff determined that adequate protective measures have already been taken to preclude freeze up of lines during extremely cold weather.
In 1977, the plant submitted a licensee event report because of a loss of off gas vent pipe sample flow due to a line freezeup as a result of the heat tracing being unplugged. A mechanical device was installed to preclude recurrence and no further problems have been evident.
As an additional measure, the plant staff will perform a check out of heat tracing associated with keeping lines from freezing on an annual basis (generally in the fall) to assure proper operation of the circuits.
Further, it should be noted that during the most recent winter (1978-1979), record low temperatures were observed in the Oswego area and the plant did not have any freezeup problems with safety related equipment.
The following table lists the systems that were reviewed that have no lines that are subjected to freezing temperatures.
Main Steam System Feedwater System Standby Liquid Control System Diesel Generators Reactor Building Closed Loop Cooling Recirculation System Automatic Depressurization System Control Room Ventilation Residual Heat Removal System Battery Room Ventilation The following table lists the systems that have lines that are subject to freezing temperatures, the function of the line, and the measure taken to prevent freeze ups.
J7 8 1579 277 g
7912140 44
~' ' Mr. Boyce H. Grier, Director October 31, 1979 United States Nuclear Regulatory Commission JAFP
SUBJECT:
NRC I & E BULLETIN 79-24 Page SYSTEM FUNCTION OF LINE MEASURE TO PREVENT Circulating Water System Intake Tunnel 88 bar heaters Residual Heat Removal Intake Tunnel 88 bar heaters Service Water (Suction)
Emergency Service Water Intake Tunnel 88 bar heaters (Suction)
Core Spray System Alternate suction from Tanks are steam Condensate Storage Tank heated, line is (Outside) heat traced High Pressure Coolant Preferred Suction and Tanks are steam Injection Test Line-Condensate heated, lines are Storage Tank (Outside) heat traced Reactor Core Isolation Preferred Suction and Tanks are steam Cooling Test Line-Condensate heated, lines are Storage Tank (Outside) heat traced Standby Gas Treatment Discharge to Plant Pipe is below frost System Stack line and sloped to keep it drained Control Rod Hydraulic Suction and Minimum Tanks are steam System Flow-Condensate Storage heated, pipes are Tank (Outside) electrically heat traced Fuel Pool Cooling Reject to Condensate Pipe is electrically Storage heat traced Containment Air Dilution Atmospheric Heat Periodically has to Exchanger be defrosted with steam Fire Protection System Outside Loop Piping Pipes are below frost and Hydrants line, hydrants ~ are self-draining to below frost line.
Semi-annual inspection.
s' 1579 2 M
Mr. Boyce H. Grier, Director October 31, 1979 United States Nuclear Regulatory Commission JAFP
SUBJECT:
NRC I & E BULLETIN 79-24 Page SYSTEM FUNCTION OF LINE MEASURE TO PREVENT Reactor Building Ventilation Cooling Coil In Intake Drained via remotely System operated electrical solenoid valves during cold weather a
Off Gas System Discharge Pipe Line Sloped to keep water drained and below frost line Off Gas System Sai.;ple Line Heat traced
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Very truly yours,
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n,D. Leonard, Jr.
Resip: : Manager JDL:RC:sw CC:
George T. Berry, PASNY, NY0 G. A. Wilverding, PASNY, NY0 P. W. Lyon, PASNY, NY0 M. C. Cosgrove, PASNY, JAF R. J. Pasternak, PASNY, JAF W. V. Childs, PASNY, JAF R. J. Converse, PASNY, JAF jFA9 2/9 Document Control Center
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