ENS 49257

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v t e ENS Event
18:30 Aug 8, 2013
Title	Technical Specification Violation During Core Reload
Event Description	While the reactor was shut down for planned maintenance, the licensee was performing a core reload in accordance with procedure. This procedure requires control rods elements to be withdrawn to get a count rate. As expected, the reactor became critical at some point. It was noted on 8/8/13 that this criticality was a violation of Technical Specification (TS) 3.1.3 which prohibits operating the reactor with any grid position empty. This procedure has been used multiple times in the past. A core reload is performed approximately every 4 years. The licensee plans on either modifying their procedure or TS to prevent this in the future. * * UPDATE FROM SEAN O'KELLY TO HOWIE CROUCH AT 1624 EDT ON 8/12/13 * * * Further investigation determined that two other technical specifications were violated during the core reload experiment being conducted. Technical specification 3.3.1(1) requires reactor water level to be no more than 25" below the overflow standpipe during critical operations. This TS was violated because the experiment was being conducted with the water level at refueling level which is lower than 25" below the standpipe and the reactor became critical, as expected. Technical specification 3.9.2.1 prohibits critical operation until all fuel elements handled are locked into their grid positions. By the very nature of the experiment, this TS was violated. The licensee will be notifying their NRC Project Manager. Notified NRR (Yin, Adams, Isaacs).

ENS 49257 +/-
Where
National Inst Of Standards & Tech Gaithersburg, Maryland (NRC Region 1)
License number:	TR-5
Reporting

Other Unspec Reqmnt
Time - Person (Reporting Time:+19.98 h0.833 days <br />0.119 weeks <br />0.0274 months <br />)
Opened:	Sean O'Kelly 14:29 Aug 9, 2013
NRC Officer:	Charles Teal
Last Updated:	Aug 12, 2013
49257 - NRC Website
v • d • e

v t e Emergency Notification System
National Inst Of Standards & Tech with Other Unspec Reqmnt
WEEKMONTHYEAR2013-08-08T18:30:00 [Table view]
[ENS list for National Inst Of Standards & Tech]

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