ML20134M403

Informs That NRC Agrees W/D Lochbaum 970108 & 970117 Retraction Ltrs Re NRC Staff Conclusion in Director'S Decision 96-23 That Design of SFP & Related Sys at Plant Adequate to Protect Public Health & Safety

ML20134M403
Person / Time
Site:	Millstone
Issue date:	02/12/1997
From:	Stephen Dembek NRC (Affiliation Not Assigned)
To:	NRC
References
DD-96-23, NUDOCS 9702200229
Download: ML20134M403 (2)

Text

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February 12, 1997 t .

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MEMORANDUM TO: File FROM: Stephen Dembek, Project Manager / Original signed by:

Special Projects Office - Licensing Office of Nuclear Reactor Regulation

SUBJECT:

JANUARY 8 AND 17, 1997, LETTERS FROM DAVID A. LOCHBAUM ON DIRECTOR'S DECISION UNDER 10 CFR 2.206 REGARDING MILLSTONE j UNIT 1 REFUELING PRACTICES (SECY PAPER NO. CRC-97-0076) i i By a January 8,.1997, letter, David A. Lochbaum of the Union of Concerned 1 Scientists commented that he disagreed with the NRC staff's conclusion in l Director's Decision 96-23 that "the design of the SFP and related systems at

' Millstone Unit I was adequate to protect public health and safety during full-core offloads." Mr. Lochbaum based his finding on his belief that the offload i decay time was based exclusively on the offsite dose consequences from a postulated fuel handling accident and not on the decay heat removal y considerations.

By a January 17, 1997, letter, Mr. Lochbaum retracted the statements in his January 8 letter. .His retraction was based on his finding that the decay time used in the fuel handling accident analysis was 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and that fuel was not moved in less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Prior to receiving Mr. Lochbaum's retraction letter, the staff found that -

Millstone Unit l's UFSAR Table 15.8-1, " Assumptions and Input Conditions for Fuel Handling Accident at Millstone Unit No. 1," had assumed a 24-hour decay time (it should also-be noted that the licensee's July 28, 1995 proposed TS amendment request explicitly' stated that the 24-hour decay time was considered as part of the proposed amendment). Furthermore, the staff found that in LER ,

93-11-01 dated December 27, 1995, the licensee stated that the shortest ~

duration between fuel shutdown and offload commencement was 66 hours7.638889e-4 days <br />0.0183 hours <br />1.09127e-4 weeks <br />2.5113e-5 months <br /> and 28 minutes. Therefore, the staff agrees with Mr. Lochbaum's conclusion in his January 17 retraction letter and no further action is planned on this issue.

Docket No. 50-245-l DISTRIBUTION:

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k ..... j 8* February-12, 1997 s File MEMORANDUM T0: ,

FROM: Stephen Dembek, Project Manager r _

Special Projects Office - Lic4nsing . .3 Office of Nuclear Reactor Regulation

SUBJECT:

JANUARY 8 AND 17, 1997, LETTERS FROM DAVID A. LOCHBAUM ON ,

i DIRECTOR'S DECISION UNDER 10 CFR'2.206 REGARDING MILLSTONE UNIT 1 REFUELING PRACTICES (SECY PAPER NO. CRC-97-0076). i By a January 8,1997, letter, David A. Lochbaum of 'the Union of Concerned Scientists commented that he disagreed with the NRC staff's conclusion in  !

Director's Decision 96-23 that "the design of the SFP and related systems at ,

Millstone Unit I was adequate to protect public health and safety during full-core offloads." Mr. Lochbaum based his finding on his belief that the offload decay time was based exclusively on the offsite dose consequences from a  ;

postulated fuel handling accident and not on the decay heat removal

' considerations.

By a January 17, 1997, letter, Mr. Lochbaum~ retracted the . statements in his January 8 letter. His retraction was based on his finding that the decay time used in the fuel handling accident analysis was 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and that fuel was not moved in less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Prior to receiving Mr. Lochbaum's retraction letter, the staff found that Millstone Unit l's UFSAR Table 15.8-1, " Assumptions and Input Conditions for Fuel Handling Accident at Millstone Unit No. 1," had assumed a 24-hour decay time (it should also be noted that the licensee's July. 28,1995 proposed TS-amendmeM request explicitly stated that the 24-hour decay time was considered-as part of the proposed amendment). Furthermore, the staff found that.in LER 93-11-01 dated December 27, 1995, the licensee stated that the shortest duration between fuel shutdown and offload commencement was 66 hours7.638889e-4 days <br />0.0183 hours <br />1.09127e-4 weeks <br />2.5113e-5 months <br /> and 28 minutes. Therefore, the staff agrees with Mr. Lochbaum's conclusion in his January 17 retraction letter and no further action is planned on this issue.

Docket No. 50-245 l

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