ML17346A296
| ML17346A296 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 03/16/1984 |
| From: | Heltemes C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Rahe E WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| Shared Package | |
| ML17346A290 | List: |
| References | |
| NUDOCS 8404130052 | |
| Download: ML17346A296 (6) | |
Text
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UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 MAR 16 1984 Mr..E. P.
- Rahe, Manager Nuclear Safety Department Nuclear Technology Division Westinghouse Electric Corporation Box 355 Pittsburgh, PA 15230
Dear Mr. Rahe:
Subject:
Case Study Report - Low Temperature Overpressure Events at Turkey Point Unit 4 Following resolution of peer review comments, we have completed the enclosed study of low temperature overpressure events.
This study concentrates on two overpressure events that occurred at Turkey Point, Unit 4, but also considers related events at other pressurized water reactors occurring after 1979 when the staff resolved the generic issue entitled, "Reactor Vessel Pressure Pro-tection (Overpressure Protection)."
The report provides:
( 1) an analysis and evaluation of the Turkey Point events; (2) a review of operating events that have challenged the low temperature over-pressure protection (LTOP) systems; (3) evaluation of the LTOP technical speci-fications; (4) an evaluation of water solid operation during the low temperature regime; and (5) recommendations that, if implemented, could reduce challenges to the overpressure protection system and strengthen its mitigatory capability to minimize the potential severity of overpressure events.
You will note that there is an activity identified for the nuclear industry to further evaluate the necessity for water solid operation and consider developing a recommended operating practice for filling and venting which excludes water solid operation.
As a vendor for a PWR design that operates water solid, I encourage you to pursue this activity in the interest of improving reactor safety.
The recommendations contained in this report are under review within the Nuclear Regulatory Commission.
The report is being forwarded for your information and use as you deem appropriate.
If you have any questions regarding this report, please contact Wayne D. Lanning of my staff.
Mr. Lanning can be reached at (301) 492-4433.
Sincerely, 8404130052 840316 PDR ADOGK 05000251 8,, PDR'.Off of Operational Data t
He es,
, Director for Analys and Evaluation
Enclosure:
As stated cc:
See page 2
Mr. E.
P.
Rahe cc:
w/o enclosure Mr. Joseph
- Sheppard, Chairman Carolina Power E Light Company Mr. Eugene P. Wilkinson, President Institute of Nuclear Power Operations Dr. David Rossin, Director Nuclear Safety Analysis Center
M<R 16 1984 Dr. Paul L. thcGfll, Yice President Commercf al Department Combustion Engfneer ing Inc.
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1OOO Prospect Hill Road Windsor, Connecticut 0609S
Dear Dr. McGfll:
~DISTR IBUTION:
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Subject:
Case Study Report - Low Temperature Overpressure Events at Turkey Point Unit 4 Following resolution of peer review comments, we have completed the enclosed study of low temperature overpressure events.
This study concentrates on two overpressure events that occurred at Turkey Point, Unit 4, but also considers related events at other pressurized water reactors occurring after 1979 when the staff resolved the generic issue entitled, "Reactor Yessel Pressure Pro-tection (Overpressure Protection)."
The report provides:
(1) an analysis and evaluatfon of the Turkey Point events; (2) a review of operating events that have challenged the low temperatur e over-pressure protection (LTOP) systems; (3) evaluation of the LTOP technical speci-fications; (4) an evaluation of water solid operation during the low temperature regime; and (5) recommendations that, if implemented, could reduce challenges to the overpressure protection system and strengthen its mitigatory capability to minimize the potential severity of overpr essure events.
You will note that there fs an activity identified for the nuclear industry to further evaluate the necessity for water solid operatfon and consfder developing a recommended operating practice for filling and venting which excludes water solid operation.
As a vendor for a PWR design that operates water solid, I encourage you to pursue this activity in the interest of improving reactor safety.
The recommendations contained fn this report are under review within the Nuclear Regulatory Commission.
The report is being forwarded for your information and use as you deem appropriate.
If you have any questions regarding this report, please contact Wayne D. Lanning of my staff.
Hr. Lanning can be reached at (301) 492-4433.
Sincerely,
<Sinai signeg by C. J. Holtemos, Jr,.
C. J. Heltemes, Jr., Director Office for Analysis and Evaluation OFFICE fj SURNAME)
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Dr. Paul L. McGill 2
cc: w/o enclosure Mr. Richard Wells, Chairman Northeast Utilities Service
- Company, Mr. Eugene P. Wilkinson, President Institute of Nuclear Power Operations Dr. David Rossin, Director Nuclear Safety Analysis Center
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