Semantic search

At 1530 EST on February 12, 2013, bones were discovered in the debris removal baskets in the Screen House at the Cook Nuclear Plant. These bones have the potential to be human remains. Local law enforcement agencies have been notified and the remains were removed by law enforcement personnel. The NRC Senior Resident Inspector was notified. Plant operations was not impacted by the event. This notification is being made in accordance with 10 CFR 50.72(b)(2)(xi) due to notification of offsite agencies and potential for media involvement related to the discovery.

• * * UPDATE FROM GREG KANDA TO CHARLES TEAL ON 2/15/13 AT 1045 EST * * *

After analysis by the Berrien County Sheriff's Department, it was determined that the bones discovered in the debris removal baskets in the screenhouse at the Cook Nuclear Plant on February 12, 2013 at 1530 EST were not of human origin, but most likely from a deer or other animal. The licensee has notified the NRC Resident Inspector. Notified the R3DO (Pelke).

At 0400 EDT on Monday, July 11, 2011, the Cook Nuclear Plant (CNP) Technical Support Center (TSC) air conditioning and charcoal filtration systems will be removed from service for scheduled maintenance. Under certain accident conditions the TSC may become unavailable due to the inability of the air conditioning and charcoal filtration systems to maintain a habitable atmosphere. Compensatory measures exist to relocate TSC personnel to the unaffected unit's control room if necessary. TSC ventilation system maintenance is scheduled to be completed by 2000 EDT on Monday, July 11, 2011. The licensee has notified the NRC Resident Inspector. This notification is being made in accordance with 10 CFR 50.72 (b)(3)(xiii) due to the loss of an emergency response facility.

• * * UPDATE FROM DAN KURTH TO JOE O'HARA AT 2151 ON 7/11/11 * * *

TSC ventilation system maintenance was completed satisfactorily and the system restored to service at 1800 EDT on 7/11/11. The NRC Resident Inspector will be notified. Notified R3DO(Bloomer)

At 02:00 on Friday, September 18, 2009, the Unit 2 AB Emergency Diesel Generator (EDG) Air Jet Assist Control Air Shutoff valve, which is required to be open, was discovered closed. At 10:30 on Friday, September 18, 2009, it was determined that with the valve closed, the EDG Air Jet Assist may not be able to support the EDG fast speed start to meet the EDG's Operability requirements. This condition renders the Unit 2 AB EDG inoperable. The valve was repositioned and verified open at 02:15 on Friday, September 18, 2009, restoring the EDG to operable status. Similar valves were verified to be in the correct position on all other EDGs in both Units. The Unit 2 AB Emergency Diesel Generator Air Jet Assist Control Air Shutoff valve was last confirmed open on July 21, 2009. The time the valve became closed is not known. Since July 21, 2009, there have been 3 periods of inoperability for Unit 2 CD EDG, the redundant Emergency Diesel Generator. During each of these periods, both of the Unit 2 EDGs are assumed to be inoperable. The periods are as follows: August 10, 2009 at 09:31 until August 10, 2009 at 23:00 August 11, 2009 at 07:30 until August 11, 2009 at 23:16 September 9, 2009 al 00:02 until September 9, 2009 at 04:40 This notification is being made in accordance with 10 CFR 50.72 (b)(3)(ii)(B) due to the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety. The licensee has notified the NRC Senior Resident Inspector.

• * * RETRACTION ON 10/01/2009 AT 1634 EDT FROM JAMES SHAW TO DONALD NORWOOD * * *

At 02:00 on Friday, September 18, 2009, the Unit 2 AB Emergency Diesel Generator (EDG) Air Jet Assist Control Air Shutoff valve, which is required to be open, was discovered closed. At 10:30 on Friday, September 18, 2009, it was determined that with the valve closed, the EDG Air Jet Assist may not be able to support the EDG fast speed start to meet the EDG's Operability requirements. This condition renders the Unit 2 AB EDG inoperable. The valve was repositioned and verified open at 02:15 on Friday, September 18, 2009, restoring the EDG to operable status. Since the last time the Turbocharger Air Jet Assist Control Air Shutoff valve was confirmed open, July 21, 2009, there were three periods where the redundant EDG was inoperable for planned maintenance and surveillance testing. During each of these periods, both of the Unit 2 EDGs are assumed to be inoperable. As such, Cook Nuclear Plant (CNP) submitted Event Notification 45361 in accordance with 10CFR50.72(b)(3)(ii)(B) due to the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety. On September 25, 2009, CNP conducted two EDG fast speed starts, one with the Turbocharger Air Jet Assist Control Air Shutoff valve closed, and one with the valve open. Based on a review of the data collected and observed performance of the EDG, the determination has been made that having the Turbocharger Air Jet Assist Control Air valve closed does not adversely impact operability of an EDG. The circumstances discussed in the notification did not result in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety. The licensee has notified the NRC Resident Inspector. Notified R3DO (Lara).