U.S. Nuclear Regulatory Commission, Division of Contracts and Property Management, Attn: BPC, Mail Stop T-7I2, Washington, D.C. 20555

A -- OECD/NEACRP PWR MSLB BENCHMARK PROBLEM SOL RQ.60780013 DUE 061297 POC Mary H. Mace, Contracting Officer, 301/415-7314/ Paulette Smith, Contract Negotiator, 301/415-6594 The Nuclear Regulatory Commission (NRC) intends to negotiate a purchase order on a sole source basis with Pennsylvania State University (PSU) to perform an international benchmark exercise related to reactor physics and reactor safety. The objective of this benchmark problem is three-fold as follows: (1) verify the capability of system codes to analyze complex transients with coupled core-plant interactions, (2) fully test the neutronics/thermal-hydraulic coupling in these systems codes, and (3) evaluate any discrepancies between predictions of coupled codes in best-estimate transient simulations. The proposed period of performance is approximately 2.5 years. This action is being pursued on a sole source basis because PSU has developed the benchmark specifications which were presented to and endorsed by the Committee on the Safety of Nuclear Installations (CSNI) as an international benchmark exercise. PSU is the only organization that has been endorsed by the CSNI to perform the benchmark exercise and the only organization acceptable to the CSNI to undertake this work. NRC intends to award this requirement under the Simplified Acquisition Procedures (not to exceed the simplified acquisition limit of $100K). Interested respondents must submit written capability statements and resumes demonstrating as a minimum: (1) Extensive knowledge and experience in developing three- dimensional (3D) reactor kinetics computer codes which are coupled to 3D thermal-hydraulic systems computer codes, (2) Extensive knowledge and experience in conducting CSNI or other international workshops or specialists meetings concerning 3D reactor kinetics and 3D thermal-hydraulic computer codes, (3) Extensive experience and expertise in analyzing and interpreting the results obtained from 3D reactor kinetics computer codes which are coupled to 3D thermal-hydraulic systems computer codes, (4) Access to TMI-1 plant data which is to be used as a basis for the Benchmark Exercise, (5) Thorough understanding of the phenomena involved in coupled 3D reactor kinetics and 3D thermal-hydraulic systems computer codes, and (6) Absence of organizational conflict of interest. Telephonic responses and responses providing insufficient information for evaluation will not be considered. See numbered Note 22. (0114)

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