ENS 52337
ENS Event | |
|---|---|
16:00 Oct 31, 2016 | |
| Title | Supplemental Cooling Inoperable During Movement of Dry Cask Storage Hi-Track Transfer Cask |
| Event Description | This 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> report is being made as per 10CFR72.75.
On October 31, 2016, at 1100 [CDT], the Supplemental Cooling System was secured to the Dry Cask Storage Hi-Track Transfer cask, as allowed by Dry Fuel Storage T.S. 3.1.4, in preparation for moving the Hi-Track transfer cask. At approximately 1500, after moving the Hi-Track into position for downloading including securing the cleats to the mating device, the next step in the procedure was to lower the Hi-Track. When lowering the Hi-Track, a crane overload condition occurred. With the crane, attached the Supplemental Cooling System can not be operated and has remained secured. The Supplemental Cooling System is classified as 'Important to Safety Category B' and is required to be utilized, as necessary, to maintain the peak fuel cladding temperature below the allowed limits. T.S. 3.1.4 allows the Supplemental cooling system to be secured for up to 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> during the Hi-Track transfer process and then followed by a 7 day allowed outage time. This is being reported based on 10CFR72.75 which states in part that a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Non-emergency notification is required if; 'An event in which important to safety equipment is disabled or fails to function as designed'. The Hi-Track is presently in a safe condition with supplemental cooling still secured. The licensee has notified the NRC Resident Inspector.
On November 1, 2016 at 1100 CDT Waterford 3 notified the NRC of a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> reportable event per 10CFR72.75. The notification is documented under EN 52337 based on the information known at that time. Follow up investigation determined that the conditions required per 10CFR72.75 were not met and should not have been reported. 10CFR72.75 states in part that a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> non-emergency notification is required if, 'An event in which important to safety equipment is disabled or fails to function as designed.' It also requires that, 'The equipment is required by regulation, license condition, or certificate of compliance to be available and operable to prevent releases that could exceed regulatory limits, to prevent exposures to radiation or radioactive materials that could exceed regulatory limits, or to mitigate the consequences of an accident.' Based on a review of the bases for Certificate of Compliance, T.S. 3.1.4 thermal analysis shows that the fuel cladding temperature would not exceed the short term temperature limits applicable to an off normal condition. The bases further states that because the thermal analysis is a steady-state analysis, there is an indefinite period of time available to make repairs to the Supplemental Cooling System. The completion time of 7 days to restore the system per T.S. 3.1.4 is considered an appropriate and reasonable amount of time to plan the work and complete repairs. Based on this information there was no possibility of exceeding regulatory limits or the need to mitigate the consequences of an accident. Waterford 3 is retracting event notification EN 52337. The licensee has notified the NRC Resident Inspector. Notified R4DO (Campbell). |
| Where | |
|---|---|
Waterford  Louisiana (NRC Region 4) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+20 h0.833 days <br />0.119 weeks <br />0.0274 months <br />) | |
| Opened: | John Meiklejohn 12:00 Nov 1, 2016 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Nov 8, 2016 |
| 52337 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (45 %) |
| After | Power Operation (45 %) |
WEEKMONTHYEARENS 523372016-10-31T16:00:00031 October 2016 16:00:00
[Table view]Other Unspec Reqmnt Supplemental Cooling Inoperable During Movement of Dry Cask Storage Hi-Track Transfer Cask ENS 468242011-05-06T07:09:0006 May 2011 07:09:00 Other Unspec Reqmnt Discovery of an After-The-Fact Unusual Event ENS 406322004-04-01T01:19:0001 April 2004 01:19:00 Other Unspec Reqmnt, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition New Worst Case Single Failure May Exceed 10 Cfr 50.46 Acceptance Criterion for Sbloca ENS 405192004-02-13T11:25:00013 February 2004 11:25:00 Other Unspec Reqmnt 24 Hour Notification Per Licensee Condition 2.F 2016-10-31T16:00:00 | |