ML20249A202
| ML20249A202 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/11/1998 |
| From: | Weiss S NRC (Affiliation Not Assigned) |
| To: | Mills G AFFILIATION NOT ASSIGNED |
| References | |
| NUDOCS 9806160172 | |
| Download: ML20249A202 (4) | |
Text
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June 11, 1998 Mr. Glen R. Mills P.O. Box 3393 Mission Viejo, CA 92690
Dear Mr. Mills:
I am replying to your April 4,1998, letter to the inspector General, which was forwarded to the NRC staff for consideration and review. Your letter expressed concerns related to possible effects of a tornado on the San Onofre Nuclear Generating Station, Unit 1 (SONGS-1) spent fuel pool.
Regarding your interest in the capability of the SONGS-1 spent fuel pcol to withstand the most severe tornado and waterspout, Southern California Edison Company (SCE) submitted a report on October 10,1986, titled " Tornado Resistance Design Review for San Onofre Nuclear Generating Statiori Unit 1." Argonne National Laboratory (ANL), under a technical assistance contract with the NRC, performed an evaluation of the October 10,1986,SCE report. The staff's safety evaluation, dated August 19,1992, was based on the ANL evaluation. The staff's safety evaluation concluded that the SCE report was conservative, state-of-the-art and complete. The staff also concluded that failure probabilities were conservatively modeled, the data used were appropriate, and the radiation dose conversion factor used in the benefit computation was also conservative. On these bases, the staff I
concluded that the SONGS-1 spent fuel pool met all the regulatory requirements for tornado winds and missiles.
Regarding your interest in whether the potential damage from tornados has been accounted for in the analysis of a station blackout simultaneous with a small break loss of coolant
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accident, it is noted that sirice the SONGS-1 plant was perrnaaently defueled, the g
mechanisms for inducing a loss of coolant accident are no longer present.
You also inquired into the number of plutonium spent fuel assemblies stored in the SONGS-1
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spent fuel pool. The SONGS-1 Decommissioning Plan, dated November 3,1994, states in Table 1 on page 2-61 that there are four mixed oxide fuel assemblies in the SONGS-1 spent fuel pool.
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Mr. Glen R. Mills 2
Thank you for informing us of your concerns. I trust this information is responsive to those concerns.. The NRC staff takes its safety responsibilities to the public very seriously and will continue to do so within the bounds of lawful authority.
If you hava any ouestions concerning this reply, please do not hesitate to contact Mr. Eid Bateman at (301) 415-1372.
Sincerely, Seym ur H. Weiss, Director Non-Power Reactors and Decommissioning Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation 1
Docket No. 50-206
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Mr. Glen R. Mills 2
Thank you for informing us of your concerns. I trust this information is responsive to those concerns. The NRC staff takes its safety responsibilities to the public very seriously and will continue to do so within the bounds of lawful authority, if you have any questions concerning this reply, please do not hesitate to contact Mr. Bill Bateman at (301) 415-1372.
Sincerely, ORIGINAL SIGNED BY Seymour H. Weiss, Director Non-Power Reactors and Decommissioning Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No. 50-206.
DISTRIBUTION:
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JLee MWebb SWeiss DMatthews JCallan (016-E15)
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l Mr. Glen R. Mills 2
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Thank you for informing us of your concerns. I trust this information is responsive to those concerns. The NRC staff takes its safety responsibilities to the public very seriously and will continue to do so within the bounds of lawful authority, if you have any questions concerning this reply, please do not hesitate to contact
.Mr. Bill Bateman at (301) 415-1372.
Sincerely, 3
ORIGINAL SIGNED BY Seymour H. Weiss, Director Non-Power Reactors and Decommissioning Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No. 50-206 DISTRIBUTION:
HARD COPY E-MAIL COPY Docket File 50-206 LWheeler (w/ incoming)
RBurrows PUBLIC EHylton (w/ incoming)
RDudley PDND r\\f NRR Mailroom (GT320)
MFairtile SCollins\\Miraglia (05-E7)
.MClark (GT320)
TFredrichs BBoger (05-E7)
MMasnik PHarris BSheron (05-E7)
WBateman (013-E16)
AMarkley WTravers (05 E7)
EDO r/f JMinns RZimmerman (05-E7)
OlG LThonus
'JRoe (012-E5)
JLee MWebb SWeiss DMatthews
. JCallan (016-E15)
AThadani (016-E15)
HThompson (016-E15)
PNorry (016-E15)
JBlaha (016-E15)
SBurns (015-B18)
MBoyle (E-Mail MLB4)
L sfW PD M
P PDN :(A)
DRPW-PDNL D D
eier on MMasnik W Bat SWeiss 6/lO/98 6/l /98 6/p/98 6////98 6/ y/98 OFFICIAL RECORD COPY
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