ML20207H893

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Amends Certificate of Compliance 6574 for Model HN-200, Authorizing Use of One 1/2-inch-13 Unc X 3-1/4-inch,ASTM A193 GR.B7 or ASTM A320 GR.L7 or L43 Stud for Item 44. Authorization Expires on 870131.Approval Record Encl
ML20207H893
Person / Time
Site: 07106574
Issue date: 12/17/1986
From: Macdonald C
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To: Leduc R
WESTINGHOUSE HITTMAN NUCLEAR, INC.
References
NUDOCS 8701080211
Download: ML20207H893 (2)


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Westinghouse Hittman Nuclear Incorporated AR File Book GJackson ATTN: Mr. R. J. Leduc HMSS R/F FCTC R/F 9151 Rumscy Road Columbia, MD 21045 Gentlemen:

As requested by Westinghouse Hittman Nuclear Incorporated application dated December 17, 1986, and pursuant to 10 CFR Part 71, Certificate of Compliance No. 6574 for the Model No. HN-200 cask is amended to authorize the use of one 1/2"-13 UNC x 3-1/4", ASTM A193 GR.B7 or ASTM A320 GR.L7 or L43 stud for Item 44 as shown on Hittman Drawing No. STD-02-076, Rev. 5. Approximately 3/4" of thread must be engaged in the primary lid. All other conditions of Certificate of Compliance No. 6574 shall remain the same.

This authorization shall expire January 31, 1987.

FOR THE U.S. NUCLEAR REGULATORY COMMISSION Orifinal S D'?dDY gt w:pE 3. locD3pkLD Charles E. MacDonald, Chief Transportation Certification Branch Division of Fuel Cycle and Material Safety, NMSS

Enclosure:

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Approval Record Model No.-HN-200 Cask Docket No. 71-6574 By application dated December 17, 1986, Westinghouse Hittman Nuclear Incor-porated requested that one stud as shown on Hittman Drawing No. STD-02-076 Rev. 5 as Item 44 for the secondary lid be changed from 1/2"-13 UNC x 2-1/2" to 1/2"-13 UNC x 3-1/4". Approximately 3/4" of thread engagement is also required to develop the full strength of the stud. An optional material (ASTM A193 GR.87) was reqdested. The material has the same yield and ultimate strengths as the originally authorized materials (ASTM A320 GR.L7 or L43).

Based on the above, we agree with the applicant that this change will not effect the packye's ability to meet the requirements of 10 CFR Part 71.

M fL Charles E. MacDonald, Chief Tmnsportation Certification Branch Division of Fuel Cycle and Material Safety, NMSS Date:  ; ,1 y e.

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