• Thank you for visiting the Cafe Rad Lab Forum
  • We present & discuss radiation health, science & news
  • To keep you informed about vital nuke information.
Hello There, Guest! Login Register


Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
NPS_Watch Jun 22, 2018
#1
The Daily Dose - Exposing the nuclear power industry while the nuclear power industry exposes you.


There are 2 EN(s) today, 1 associated with power stations.

[  ]

NRC Event Notices for June 22, 2018  
https://www.nrc.gov/reading-rm/doc-colle...622en.html
[ page nav working, event dates entered, event times not entered ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Power Reactor Event Notices
----------------------------------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------------------------------------
----------- [ Current event for PA_BeaverValley_1 ]

20180621 | PA_BeaverValley_1 | Retract GAS VOIDS DISCOVERED IN BOTH TRAINS OF LOW HEAD SAFETY INJECTION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53419

"On 5/22/2018, while operating at approximately 100 percent power,
Ultrasonic Testing of the Beaver Valley Power Station (BVPS) Unit 1 Low Head Safety Injection (LHSI) pump suction piping
identified gas voids in excess of the acceptable limit for void volume.

Both trains of LHSI were declared inoperable.

Technical Specification (TS) 3.5.2 for both trains of the LHSI system was entered
along with TS 3.0.3 which requires the initiation of a plant shutdown.

Time of TS entry was 12:56 (EDT).
"Plant shutdown was commenced at 15:56 (EDT) in accordance with plant procedures.

[ Three hours before shutdown was begun. ]

"At 15:59 (EDT) Train 'A' LHSI was restored to operable status, TS 3.0.3 Action was exited
and the power reduction was stopped at approximately 99 percent.

"At 17:43 (EDT) Train 'B' LHSI was restored to operable status, TS 3.5.2 Actions were exited.

[ Doesn't say what, if anything, was done to correct the problem. ]

"This is reportable per
10 CFR 50.72(b)(3)(ii) Unanalyzed Condition,
10 CFR 50.72(b)(3)(v) Event or Condition that Could Have Prevented the Fulfillment of a Safety Function and
10 CFR 50.72(b )(2)(i) TS Required Shutdown.

"The NRC Resident Inspector has been notified."


* * * RETRACTION ON 6/21/18 AT 1535 EDT FROM SHAWN KEENER TO RICHARD SMITH * * *

"Further engineering evaluation has determined that the gas voids that existed at the time of discovery
would not have rendered the LHSI [Low Head Safety Injection] system inoperable if it were required to actuate.

The engineering evaluation concluded that filling of the containment sump during a Design Basis Accident would result in a void volume reduction such that the void in the LHSI suction piping would not be large enough to significantly impact the operability of the system.

[ So after it began leaking and filling up containment the gas bubble would go away. ]

Therefore, the system remained operable but degraded.

No TSs [Technical Specifications] were required to be entered and no shutdown was required.

As such, all three reporting criteria do not apply and are being retracted.

"The NRC Resident Inspector has been notified."

Notified R1DO (Burritt).

[ This EN is similar to the TN_WattsBar issue with voids [ gas bubbles ] problem. ]
[ Noticce that someone identified a problem, went to the book and began a shutdown. ]
[ The shutdown was halted 3 mins after initiation, possibly on management orders. ]
[ At a later date, in this case 30 days, a retraction is issued based on "Further engineering evaluation". ]
[ Nuke industry motto, ' If the bar is too high, just lower the bar. ' ]


----------- [ 2018 event history for PA_BeaverValley ]

20180522 | PA_BeaverValley_1 | GAS VOIDS DISCOVERED IN BOTH TRAINS OF LOW HEAD SAFETY INJECTION |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53419


20180510 | PA_BeaverValley_1 | Exit RFO ( 25 / 30 )
20180414 | PA_BeaverValley_1 | Begin RFO


20180223 | PA_BeaverValley_1;2 | FITNESS FOR DUTY - MISUSE OF A CONTROLLED SUBSTANCE BY SUPERVISORY PERSONNEL |
https://www.nrc.gov/reading-rm/doc-colle...ml#en53228

--------------------------------------------------------------------------------------------------
----------- [ Current event for
----------- [ 2018 event history for
--------------------------------------------------------------------------------------------------
----------- [ Part 21 Notice ]
----------------------------------------------------------------------------------------------------------------------------------------------------
----------------- Other reactor info from daily power tracking
-----------------------------------------------------------------------------------------------------------------

[*][ the asterisk signifies that an uptick in rad detection at nearby EPA radmon stations was observed on NETC. ]


Region 1

*NY_FitzPatrick_1 @ 99 % unchanged ; 99 % 99 %, no EN, reason for power drop unk.


Region 2


AL_Browns_Ferry_3 @ 94 % unchnged ; 94 % ; 94 % ; 91 % ; 79 % : 52 % ; 52 % saturday, no EN, reason for power drop unk.  
[ Unit unable to achieve full power since exiting RFO Apr 03 ] ( used 45 of typ 43 days )

SC_Robinson_2 @ 35 % up from 0 % shutdown 06/15, no EN, reason for power drop unk.

*FL_TurkeyPoint_4 @ 75 %, no EN, reason for power drop unk.

*TN_Watts_Bar_2 @ 85 % up from 60 %, no EN, reason for power drop unk.


Region 3

*IL_Dresden_2 @ 100 % up from 78 % ; 63 % ; 60 %, no EN, reason for power drop unk.




Region 4

AR_Arkansas_1 @ 68 % up from 65 % ; 40 % ; 2 % ; 0 % ; 0 %, recovering from MANUAL REACTOR TRIP DURING STARTUP     
https://www.nrc.gov/reading-rm/doc-colle...ml#en53459

MS_GrandGulf_1 @ 0 % RFO day 77 of the planned 50, wonder what they are fixing.


----------------------------------------------------------------------------------------------------------------------------------------------------

[ There are currently 0 units with the RPV open - ref the Current ReFueling Outage Schedule and Status ]

posted by Staup Knewkinus a Dane Gerous production. All human rights reserved.
 
Reply
  


Forum Jump:


Browsing: 1 Guest(s)