ML20085D937

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Documents Understanding That Exemption to Applicable Regulations Re Use of Westinghouse Lead Test Assemblies W/ Zircaloy-clad Matl Will Be Issued by NRC W/O Further Util Action & That Assemblies Can Be Used During Cycle 9
ML20085D937
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 10/09/1991
From: Broughton T
GENERAL PUBLIC UTILITIES CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
C311-91-2115, NUDOCS 9110170284
Download: ML20085D937 (2)


Text

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GPU Nuclear Corporation

. MJ Nuclear  :== = ~

Middletown, Pantinivania 17057 0191 717 944 76?)

lllLX 84 2360 Wnteri Dnect Dial Nurntmr (117) 948-8005 Octd er 9, 1W1 C311-91-2115 U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Document Control Desk Gentlemen:

Subject:

Three Mlle Island Nuclear Station, Unit 1 (IMI-1) facility License tio. OPR-50 Docket No. 50 289 Westinghouse lead lest Assemblies (LlAs)

ZlRLO Cladding Material Exemption At a meeting on January 18, 1991, GPU Nuclear (GPUN) presented information to the NRC staff concerning the use of four Westinghouse LIAs during upcoming Cycle 9 operation of 1Mi-1. As proposed at the meeting, it has been concluded that the Westinghouse LlAs are acceptable for use in the Cycle 9 core under the provisions of 10 CfR 50.59.

Two of the four LIAs will contain selected fuel rods (less 'han 15% of total rods) clad with ZlRLO, a zirconium based alloy with improved material properties. The staff verbally informed GPUN in May 1991 that an exemption would not be needed for the use of ZlRLO. Recently, however, the staff informed GPUN by telephone that an exemption would be needed since certain regulations (e.g.,10 CIR 50.44 and 10 CFR 50.46) refer to zircaloy cladding material and not ZlRLO. Based on discussions with the staff, and separately with Westinghouse, 't is our understanding that the staff has no technical concerns with ZlRLO that would preclude its use in the t1As. This is consistent with the July 1, 1991 NRC acceptance of Westinghouse Topical Report WCAP-12610 on the VANTAGE + fuel assembly.

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GPU Nuckw Corpombon is a sutmdary of Genoul Puth Ube. romumhon

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Document Control Desk C311-91-2115

. Page 2 The purpose of this letter is to document our understanding based on conversations with the NRC Staff that an exemption to applicable regulations will be issued without further CPUN action and that the L.1As can be used at 1MI-l during Cycle 9 operation which is scheduled to begin as early as November 10, 1991.

Sincerely,

}g [4r~

1. G. Brougiton Vice President and Director, 1MI-l PFC/amk cc: Administrator, Region 1 1Ml-1 NRC Project hanager NRC Resident inspector

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