Tuesday, 15 September 2015

US #NUCLEAR (EMERGENCY?) **ongoing event**

Published via ripped: due to the urgency (unread atm)

"Problems at Fermi 2.
RadChick Radiation Research & Mitigation added 3 new photos.
‪#‎FERMI2‬ / ‪#‎GREATLAKES‬ ‪#‎NUCLEAR‬ ‪#‎ALERT‬ ‪#‎MONROE‬ ‪#‎MICHIGAN‬: MANUAL‪#‎SCRAM‬ DUE TO LOSS OF TURBINE BUILDING CLOSED COOLING WATER with other unanticipated problems/unisolable leaks! (See my notes at end)
"At 2305 EDT on September 13, 2015, a manual scram was initiated in response to a loss of all Turbine Building Closed Cooling Water (TBCCW). All control rods fully inserted. The lowest Reactor Water Level (RWL) reached was 137 inches. All isolations and actuations for RWL 3 occurred as expected. Decay heat was initially being removed through the Main Turbine Bypass System to the Main Condenser, however, as a result of the loss of TBCCW, the Main Feed Pumps lost cooling and had to be secured. At 2310, Standby Feedwater was initiated and Main Feedwater was secured.
"The loss of TBCCW also caused all Station Air Compressors (SACs) to trip on loss of cooling. The loss of SACs caused the Instrument Air header pressure to degrade to the point at which the Secondary Containment isolation dampers drifted closed. This resulted in the Reactor Building vacuum exceeding the Technical Specification limit. At 2325, operators started the Standby Gas Treatment system and manually initiated a Secondary Containment isolation signal. Secondary Containment vacuum was promptly restored to within Technical Specification limits. Additionally, Operators were monitoring for expected MSIV drift due to the degraded Instrument Air header pressure. When outboard MSIVs were observed to be drifting, Operators closed the outboard and inboard MSIVs at 2345. At 2352, Safety Relief Valves (SRVs) reached the Low-Low Setpoint and began cycling to control reactor pressure.
"RWL is currently being maintained in the normal level band with the Standby Feedwater and Control Rod Drive systems. Reactor Pressure is being controlled with Safety Relief Valves. Operators are currently in the Emergency Operating Procedure for Reactor Pressure Vessel control. Investigation into the loss of TBCCW continues.
"No safety-related equipment was out of service at the time of the event. All offsite power sources were adequate and available throughout the duration of the event.
"The NRC resident inspector has been notified."
"At 0409 EDT the Reactor Core Isolation Cooling (RCIC) system was placed in service due to identification of an **unisolable** leak in the Standby Feedwater System. Reactor water level and pressure is now being controlled though the RCIC system and Safety Relief Valves. This event update is reportable as a valid manual initiation of a specified safety system under 10CFR50.72(b)(3)(iv)(A).
"The NRC resident inspector has been notified."
The leak rate was reported as approximately 5-10 gallons per minute from a weld on the standby feedwater pump header drain valve F326. The licensee reported the leak stopped once RCIC was placed into service. The licensee is still investigating the issue.
Notified the R3DO (Pelke), IRD Manager (Grant), NRR EO (Morris).
"At 1847 EDT on September 14, 2015, a valid automatic Reactor Protection System (RPS) actuation occurred due to Reactor Water Level 3 while shutdown in MODE 3. Operators were manually controlling Reactor Pressure Vessel (RPV) level and pressure with Reactor Core Isolation Cooling (RCIC) and Safety Relief Valves (SRV). While operators were cycling SRVs, the RPV level went below the Level 3 setpoint. Operators promptly restored RPV level by manual operation of RCIC. The Level 3 actuation and associated isolations were verified to operate properly.
"The scram signal has been reset. Fermi 2 remains in MODE 3 controlling RPV Level and Pressure through manual operation of RCIC and SRVs.
"This is the second occurrence of a valid specified safety system actuation reportable under 10CFR50.72(b)(3)(iv)(A) for this **ongoing event**
"The NRC Resident Inspector has been notified."
*Note from RC: Watch for further updates here at the link, they (Fermi/DTE) seem to be having quite a bit of difficulty keeping water levels up, more than just the leak of 5-10 gallons/min. There must be a leak somewhere else. I am also hearing, and waiting to get confirmation, If the cooling system is compromised, well. More on that later, hopefully it won't be necessary to discuss the ramifications of having a nuclear meltdown next to the largest freshwater lake system in the world. Oh, wait, they already had one there in 1966...
"We almost lost Detroit" by John Fuller http://wsrl.org/pdfs/detroit.pdf
Many many thanks to the always vigilant team of the Laws Family who brought this to my attention, as they do frequently for any nuke plant problems in the Midwest. Hugs Brian & Suzan
Keep an eye on this guys. I hope to have more info soon ~RC"

  • https://www.facebook.com/christina.consolo/posts/1072343419465520 

Latest Top Stories -->> http://www.occupythebanks.com 

No comments :

Post a comment

Only members (obviously) can comment; no moderation; direct to page.

Note: only a member of this blog may post a comment.