ML18016A830
| ML18016A830 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 01/22/1999 |
| From: | Lochbaum D UNION OF CONCERNED SCIENTISTS |
| To: | Diaz N, Dicus G, Shirley Ann Jackson, Mcgaffigan E, Merrifield J, The Chairman NRC COMMISSION (OCM) |
| References | |
| FRN-64FR2237 64FR2237-00015, 64FR2237-15, NUDOCS 9903010126 | |
| Download: ML18016A830 (4) | |
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~I UNION OF CONCERNEO SCIENTISTS January 22, 1999 Chairman Shirley A. Jackson Commissioner Nils J. Diaz Commissioner Greta J. Dicus Commissioner Edward McGafftgan, Jr.
Commissioner Jeffrey S. Memfield United States Nuclear Regulatory Commission Washington, DC 20555-0001 SUMECT:
CURRENT EXAMPLEOF RISK-DEFORMED REGULATION
Dear'Chairman and Commissioners:
During the January 11 Commission briefing on risk-informed regulation and during the January 20 briefing on the proposed reactor oversight process, I'expressed our concern that the NRC and the nuclear industry are making risk decisions using incomplete and inaccurate data. As a current example, I call your attention to the license amendment application dated December 23, 1998, by the Carolina Power &
Light Company involving spent fuel storage at the Harris Nuclear Power Plant and the subsequent proposed no significant hazards consideration determination (Federal Register: January 13, 1999, Vol.
64, No. 8) prepared by the NRC staff.
The licensee and the NRC staffkave improperly downplayed the risk associated with the proposed activity. Their risk characterization is wrong. The licensee should be required to resubmit a corrected application and another Federal Register notice issued with a corrected proposed no significant hazards consideration determination.
The error involves the determination made by the licensee and endorsed by the staffregarding the affect ofthe proposed activity, namely placing storage racks in Spent Fuel Pools 'C'nd 'D't the Hanis plant, on the probability ofa fuel handling accident. From the Federal Register notice:
REC'D BY SEC'P.,
2t'AM% >>: OS "The probability that any ofthe accidents in the above list [a spent fuel assembly drop in a spent fuel pool / loss ofspent fuel pool cooling low/ a seismic event /misloaded fuel assembly] can occur is not significantly affected by the activity itself.... The probabilities ofaccidental fuel assembly drops or misloadings are primarily influenced by the methods used to liftand move these loads. The method ofhandling loads during normal plant operations is not signficantly changed, since the same equipment (i.e., Spent Fuel Handling Machine and tools) and procedures as those in current use in pools 'A'nd 'B'illbe used in pools 'C'nd 'D.'ince the methods used to move loads during normal operations remain nearly the same as those used previously, there is no significant increase in the probability ofan accident."
Washington ONce: 1616 P Street NW Suite 310 e Washington DC 20036-1495
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Two Brattle Square.
~ Cambridge MA 02238-9105
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~ Berkeley CA 94704-1567
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January 22, 1999 Page2of2 It is precisely this type of"smoke and mirrors" shenanigans that we decried during the briefings. The logic seems proper at face value, but it does not take much effort to show that it is wrong. In Enclosure 1
to the license amendment submittal, the licensee reported that the total storage capacity ofpools 'A'nd
'B's 3,669 assemblies and that the proposed activity willadd 4,715 storage locations in pools 'C'nd
'D.'hus, ifthe amendment is granted, Cp&Lwillhandle -p~ick u and~cue about twice as many irradiated fuel assemblies as they
'1Lif'the amendment is not granted.
Consider for a moment the old game ofRussian roulette using a six-chamber revolver loaded with a single bullet. CP&Land the NRC staffwould apparently conclude that the probability oflosing the game are not increased whether one or two turns are taken because, after all, the same method and the same equipment are used each turn. Their logic is simply wrong, The probability ofa fuel handling accident at Hams willnearly double ifthe license amendment request is granted. This material fact contradicts, the conclusion ofthe licensee and the staff that there willbe "no significant increase in the probability."
unless doubling the risk is not significant.
Luckily,there's an opportunity to fixthe mistake this time. Unfortunately, it's not the first, and probably won't be the last, time this mistake is made. The NRC staff made this same mistake in April 1998 when it allowed the Paducah facilityto continue operating with its risk doubled.
We have no intention at this time offormally intervening in this Harris licensing action. We trust that the NRC staffwilltake the necessary steps to have the licensee fixthe fundamental fiaw in the licensing amendment request before granting it.
Sincerely, David A. Loch aum Nuclear Safety Engineer
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