NUREG-1537, Part 2 - NRC

BEU TO LEU COPvERSION
characteristics. The reviewer should compare the format of the proposed technical
specifications with Chapter 14 of the format and content guide, the content with
10 CFR 50.36, and the specifications with the technical specifications for similar
non-power reactors that have been converted from the use of HEU fuel.
Evaluation Findings
This section of the SAR should contain sufficient information on technical
specifications to support the following types of conclusions, which will be included
in the staffs safety evaluation report:
* The proposed changes in technical specifications are the minimum required
by the conversion from BEU to LEU.
* The proposed technical specifications for the LEU-fueled reactor are
consistent with the dynamic and safety analyses that have been reviewed
and accepted. They provide assurance that the risks to the health and
safety of the public from the LEU-fueled reactor will not be significantly
greater than from the existing HEU fueled reactor and are acceptable.
15 OTBER LICENSE CONSIDERATIONS
This section includes some considerations and issues that might not be completely
covered in other chipters. The examples given below are typical topics that
should be considered, but additional topics may be necessary on a case-by-case
basis. The reviewer should verify that the information submitted is consistent with
the guidance in Chapter 15 of the fornat and content guide, as supplemented
below.
15.1 Prior Utilization of Reactor Components
Two issues worthy of additional comment follow:
* Safety limits and resistance to failure of the fuel may be based on
assumptions concerning the softening temperatures, burnup, cladding
thickness, and strength of materials. The licensee should provide assurance
that these parameters have not been changed significantly by prior use or
storage and that the alloy or composition specifications of ihe rmateiials are
consistent with the assumptions in the analyses.
* Thermal-hydraulic analyses require knowledge of material composition,
thickness, and heat conductivity. For pulsing reactors, heat capacity and
temperature coefficients of reactivity also are essential parameters. The
licensee should provide assurance that prior use or storage has not changed
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