OPERATION AND CORE ENHANCEMENTS- LICENSE AMENDMENT REQUEST 93-18

• Main Authors: Mr. Ted, C. Feigenbaum
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1994
• Subjects: North Atlantic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.591.6886; http://pbadupws.nrc.gov/docs/ML0118/ML011800272.pdf

The amendment modifies the Seabrook Technical Specifications (TS) to permit operation of the Seabrook core with an expanded axial flux difference band (wide-band operation) from that currently permitted. Other TS changes allow for fuel design enhancements. Wide-band operation is based on information derived from the fixed in-core detector system (FIDS). The use of FIDS to satisfy TS requirements was approved by Amendment 27 issued on December 22, 1993. The core design enhancements are based on methodologies described in YAEC-1849P, YAEC-1854P, and YAEC-1856P which were approved previously for use at Seabrook. North Atlantic supported the proposed technical specification changes with reanalyses of the UFSAR Chapter 15 accidents and transients, documented in YAEC-1871, and a Westinghouse Electric Corporation loss-of-coolant-accident reanalysis. These supporting documents and a revised Core Operating Limits Report were submitted with the application for amendment. North Atlantic proposed certain changes to TS 3.1.1.3 that mould have permitted operation with a positive moderator temperature coefficient. The Commission has not yet determined if this change is acceptable. We have discussed with your staff additional information that North Atlantic must provide for us to continue with our review of this issue. Therefore, the proposed change to TS 3.1.1.3 is not being approved at this time. Additionally, North Atlantic will need to modify TS 6.8.1.6, regarding the COLR prior to entering Cycle 5 to reflect the results of these evaluations and the new methodologies used to develop the COLR.