05000263/FIN-2014003-02
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Operation Outside of Reactor Coolant System Pressure and Temperature Limits |
| Description | An URI associated with TS 3.4.9, Reactor Coolant System Pressure and Temperature Limits, was identified. Technical Specification 3.4.9 requires, in part, that RCS pressure and RCS temperature shall be maintained within the limits specified in the PTLR, which requires that RCS pressure remain at or above 0 psig. Between May 22, 2011, and February 5, 2014, Monticello RCS pressure was decreased below 0 psig several times during reactor startup activities. During an operating experience review in April 2014, the licensee noted that a vacuum of approximately3 psig had been drawn on the RPV six times, and in one case a vacuum of17.5 psig was drawn, which was outside of the limits specified in the PTLR. The licensees analysis showed that there was no impact on RPV integrity due to the existence of the partial vacuum conditions. The licensee entered this issue into the CAP and initiated action to revise the PTLR limits and submit them for NRC review. Inspectors reviewed the results of the licensees operating review and decided that additional information was needed, including insights from NRRs more generic resolution to industrywide issues regarding TS PTLR limits, to determine whether a performance deficiency exists. |
| Site: | Monticello  |
|---|---|
| Report | IR 05000263/2014003 Section 4OA3 |
| Date counted | Jun 30, 2014 (2014Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | I Hafeez J Beavers J Neurauter K Riemer M Davis M Learn M Mitchell M Ziolkowski P Voss P Zurawski S Bell T Bilikk Riemerk Stoedter M Phalen P Laflamme P Voss P Zurawski |
| INPO aspect | |
| ' | |
Finding - Monticello - IR 05000263/2014003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Monticello) @ 2014Q2
Self-Identified List (Monticello)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||