ENS 41500
ENS Event | |
|---|---|
22:55 Mar 17, 2005 | |
| Title | Other Unspecified Requirement - License Condition 2.F |
| Event Description | The following information was obtained from the licensee via facsimile (licensee text in quotes):
This notification is being made in accordance with License Condition 2.F for Nine Mile Point Unit 2 which states in part 'report any violations of the requirements contained in Section 2.C of this license in the following manner: initial notification shall be made within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to the NRC Operations Center via the Emergency Notification System, with written follow-up within 30 days in accordance with the procedures described in 10 CFR 50.73(b), (c), and (e).' License condition 2.C (2) states in part 'Nine Mile Point Nuclear Station, LLC shall operate the facility in accordance with the Technical Specifications.' Earlier this year Operations was notified by Engineering that a portion of the procedural guidance contained in the Operating Procedure for Standby Gas Treatment System (SGTS) would render an operating SGTS sub-system inoperable during certain evolutions (e.g. Primary Containment Purge). Specifically when the filter train's recirculation valves are taken out of the automatic mode of operation, the subsystem's ability to drawdown the Secondary Containment within the required time and maintain less than 1/4" W.C. vacuum cannot be assured. In accordance with the guidance provided in NUREG-1022, an extensive review of the operation of the SGTS system over the past 3 years was performed. This review identified two (2) instances where, if a SGTS subsystem(s) had been declared inoperable as required, one or more Technical Specifications would have been violated. For example: on 3/15/2002 one SGTS subsystem was being utilized for Primary Containment Purge evolutions (and as such inoperable) and the opposite Division's EDG was simultaneously inoperable for pre-planned maintenance for greater than 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. Technical Specification 3.8.1 Condition B.2 requires declaring required feature(s), supported by the inoperable DG, inoperable when the redundant required feature(s) are inoperable (i.e. the non-running SGTS subsystem). This was not recognized and the requirement to initiate a plant shutdown per LCO 3.0.3 was not performed. The second instance occurred in November of 2002 and was similar to the first occurrence. Following the identification of these occurrences Engineering performed an analysis of actual plant data to confirm inoperability of SGTS. The example noted above and the others identified will be explained in detail in the follow-up LER that will be submitted as required by 10CFR 50.73(a)(2)(i)(B) - 'Any operation or condition which was prohibited by the plant's Technical Specifications.' The licensee has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-1.17 h-0.0488 days <br />-0.00696 weeks <br />-0.0016 months <br />) | |
| Opened: | John Manly 21:45 Mar 17, 2005 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Mar 17, 2005 |
| 41500 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 493862013-09-25T19:30:00025 September 2013 19:30:00
[Table view]Other Unspec Reqmnt Environmental Impact During Service Water Mollusk Biocide Treatment ENS 432862007-01-11T16:11:00011 January 2007 16:11:00 Other Unspec Reqmnt Initiation of Invalid Primary Containment Isolation Signals ENS 423862006-03-03T23:00:0003 March 2006 23:00:00 Other Unspec Reqmnt Reactor Building Ventilation Flowpath Inoperable ENS 415002005-03-17T22:55:00017 March 2005 22:55:00 Other Unspec Reqmnt Other Unspecified Requirement - License Condition 2.F ENS 407492004-05-14T13:17:00014 May 2004 13:17:00 Other Unspec Reqmnt, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Change in the Methodology Used by Ge/Gnf to Demonstrate Compliance with Eccs Performance Requirements ENS 404872004-01-28T20:30:00028 January 2004 20:30:00 Other Unspec Reqmnt 24-Hour Condition of License Report Due to Inoperable Division II Control Room Special Filter Train 2013-09-25T19:30:00 | |