ML17346A291
| ML17346A291 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 03/16/1984 |
| From: | Heltemes C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Wilkinson E INSTITUTE OF NUCLEAR POWER OPERATIONS |
| Shared Package | |
| ML17346A290 | List: |
| References | |
| NUDOCS 8404130042 | |
| Download: ML17346A291 (6) | |
Text
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~O 0~**4 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 MAR 16 ]984 Mr. Eugene P. Wilkinson, President Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500
- Atlanta, GA 30339
Dear Mr. Wilkinson:
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 entitledI "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'ater solid operation and consider developing a recommended operating practice for filling and venting which excludes water solid conditions.
As one of the leading industry representatives, 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.
Nr.. Lanning can be reached at (301) 492-4433.
Sincerely, 8404i30042 8403ih
,PDR ADOCK 0500025i 8
Enclosure:
As stated l
C.. e, Director'ffi for Analysi and Evaluation of Operational Data cc:
See page 2
il I
H I'
Mr. Eugene P. Wilkinson 2
BAR 16 ]g84 cc:
w/o enclosure Mr,. Joseph
- Sheppard, Chairman Carolina Power
& Light Company Mr. Richard Wells, Chairman Northeast Utilities Service Company Dr. David.Rossin, Director Nuclear Safety Analysis Center Dr. Paul L. McGill, President Combustion Engineering Inc.
Mr. E.
P.
- Rahe, Manager Westinghouse Electric Corporation
MAR 1 8 )g84
'r.
Eugene P. Wilkinson, President Institute of Nuclear Poser Operations
. 1100 Circle 75 Parkway, Suite 1500
- Atlanta, GA 30339
Dear ttr. Wilkinson:
DISTRIBUTION:
IRK l'DP AEOD CF ROAB CF ROAB RF WLanning KVSeyfrit TAIppolito CJHe1 temes
Subject:
Case Study Report - Low Temperatur e Overpres sure Events at Turkey Point Unit 4 fol 1 owi ng resolution of peer revi ew comments, we have completed the encl osed study of 1 ow temper atur e 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 eval uation of the Turkey Point events;
( 2) a revi ew of operating events that have challenged the 1 ow tenperature, over-pressure protection (LTOP) systems; (3) evaluation of the LTOP technical speci-fications; (4) an eval uation of water solid operati on dur ing the 1 ow temperature regime; and
( 5) recommendations that, if implemented, could reduce challenges to the overpressure protection system and strengthen its mitigatory capabil ity to minimize the potential severity of overpressure events.
The recommendations contained in this report are under review within the Nucl ear 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.
fear. Lanning can be reached at (301) 492-4433.
Sincerely, priginal sigTTe C. J. Heltemes, J1 C. J. Hel temes, Jr., Director Office for Analysis and Evaluation of Operational Data You wil 1 note that there is an activity identi fied 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 conditions.
As one of the leading industry representativ0s, I encourage you to pursue thi s activity in the interest of improving reactor safety.
OFFICE
" SURNAME DATE
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NRG FQRM 318c (2.82) NRCM 0240 OFFICIAL RECORD COPY
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Mr. Eugene P. Wilkinson ViAR 16 ]984 cc:
w/o enclosure Mr,. 'Joseph
- Sheppard, Chairman Carolina Power 5 Light Company Mr. Richard Wells, Chairman Northeast Utilities Service Company Dr. David.Rossin, Director Nuclear Safety Analysis Center Dr. Paul L. McGill, President Combustion Engineering Inc.
Mr.. E.
P.
- Rahe, Manager Westinghouse Electric Corporation