05000336/FIN-2015201-03
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Finding | |
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| Title | Failure to Obtain a License Amendment for a Change to the Decay Time Technical Specification |
| Description | 10 CFR 50.59(c)(1) states, in part, that a licensee may make changes in the facility as described in the final safety analysis report (as updated) without obtaining a license amendment pursuant to 10 CFR Part 50.90, Application for Amendment of License, Construction Permit, or Early Site Permit, only if a change to the TSs incorporated in the license is not required and the change does not meet any of the criteria in 10 CFR 50.59 ( c)(2). Contrary to the above, on June 22, 2010, DNC made a change to Millstone Unit 2 Chapter 9 of the UFSAR and TS Bases Sections 3.9.3 and 4.9.3 that required a change to the TSs without first obtaining a license amendment. Specifically, DNC removed all discussion of the spent fuel pool (SFP) heat load analysis from TS Bases Sections 3.9.3 and 4.9.3 and Chapter 9 of the UFSAR, thereby changing the meaning of TS 3.9.3.1, without obtaining prior NRC approval. Specifically, DNC removed all discussion of the SFP heat load analysis, which eliminated one of the principal reasons for the existence of the decay time TS. In addition, DNC determined that a decrease in the required amount of irradiated fuel decay time did not have an adverse effect and did not complete a 50.59(c)(2) evaluation. However, the change resulted in a larger maximum heat load in the SFP (bulk water temperature up to 28 F higher), an increase in fuel temperature during emergency core offloads, an increase in the quantity of SFP make-up water during core offload conditions, a lower required ultimate heat sink temperature (10 F lower service water supply), a decrease in the time to boil during refueling and core off loads, and a substantial reduction in margin to local boiling, all of which met the requirement for performing a 50.59(c)(2) evaluation in accordance with 50.59(c)(1). |
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2015201 Section 1R17 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | Violation: Severity level Enforcement Discretion |
| cornerstone | No Cornerstone |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.17 |
| Inspectors (proximate) | B Bickett D Willis G Carpenter L Casey M Parker R Morris |
| Violation of: | 10 CFR 50.59 10 CFR 50.90 Technical Specification |
| INPO aspect | |
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Finding - Millstone - IR 05000336/2015201 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2013Q2
Self-Identified List (Millstone)
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