The higher flows in the steamlines carrying scavenging steam to the high-pressure feedwater heaters are predicted to increase the flow-assisted corrosion in these lines to as much as 0.070 inches per year. The constant-pressure power uprate produces higher steam and feedwater flows in the plant. We have been quite impressed by the reviews being done by the staff and agree that the exceptions taken by the licensee to the ELTR1 and ELTR2 methodologies are acceptable. Based on these reviews, the staff has accepted the licensee's proposed deviations from the approved methodologies.
These reviews include onsite audits and interviews with analysts. For the power uprate at Clinton, the staff is conducting extensive reviews and audits of codes, inputs, and methods used for the accident analysis. The staff has not been reviewing reload analyses routinely. The licensee proposes to provide a summary report on design-basis accident analyses as part of its core reload submission, rather than as part of the power uprate application. Consequently, the licensee has taken exceptions to the ELTR1 and ELTR2 methodologies for their specific situations. This power uprate is, however, a constant-pressure power uprate, and the staff is in the process of reviewing the generic methodology for such an uprate. These methodologies have been approved by the staff and have been used for the power uprates at the Duane Arnold, Quad Cities, and Dresden plants. To a significant extent, the licensee has followed the methodologies defined in the Extended Power Uprate Licensing Topical Reports (ELTR 1 and ELTR 2). As part of the power uprate, the licensee will incorporate fuel assemblies of a new design into the core. Although the power uprate is substantial, the unit will still be operating within the power range of other BWR/6 nuclear steam supply systems. The power uprate is to be done in steps of 7 and 13%. The importance of this program should be communicated to NRC staff inspecting the uprated Clinton Power Station.ĪmerGen, the licensee for the Clinton Power Station, Unit 1, has applied for a 20% power uprate that will take this boiling-water reactor (BWR/6) in a Mark III containment from a licensed power of 2894 MWt to 3473 MWt. The AmerGen program to monitor piping expected to suffer from significant flow-assisted corrosion at the uprated flow conditions should be rigorously conducted. These reviews make acceptable the exceptions taken by the licensee to the approved power uprate methodologies for such analyses. The staff has been conducting extensive reviews of codes, inputs, and methods for analysis of design-basis accidents at the uprated plant. The proposed constant-pressure power uprate of 20% for the Clinton Power Station, Unit 1, should be approved. We also had the benefit of the documents referenced. During our review, we had discussions with representatives of the applicant and the NRC staff. Our subcommittee on Thermal-Hydraulic Phenomena reviewed this matter during a meeting held on February 13-14, 2002.
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Subject: Core Power Uprate for Clinton Power Station, Unit 1ĭuring the 490th meeting of the Advisory Committee on Reactor Safeguards, March 7-9, 2002, we completed our review of the AmerGen Energy Company (AmerGen) license amendment request for an increase in core thermal power for the Clinton Power Station, Unit 1.
Core Power Uprate for Clinton Power Station, Unit 1
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