Tuesday, August 16, 2016

Junk Plant Pilgrim: Ocean Temp too Hot Now (Again)

update 8/17

So the Ocean hot water will intensify and wane during the tide cycle, but slowly trend up. Pilgrim has seen the ocean temperature slowly trend up for weeks and they would have predicted it would lead to a shutdown or down power. The ocean temps will continue to trend up until the middle of September. I suspect we will see them in repeated shutdowns and down powers for another month or more. It will beat the hell out of the plant. This environment is rich with screw-ups and breaking equipment, it is highly likely they will get a plant trip or other accident.

Update:
Even with 80 degrees service water temp update, still think Millstone might have to come down in power. So there has been a tremendous drought this summer. All the fresh water going into the Sound has been drastically reduced through the drought. How will this effect the Sound's temps? 
Why won't Seabrook have this problem? They grab their cooling seawater through a under ocean tunnel many miles out to sea. 
I thought they upped their service water temperature high limit in a License Amendment Request (LAR). This seems to be a really strong high temperature event.  They are sitting at 50% last night, are they back washing the circ water system.

When did it last happen. This happens in the later half of Aug...


This has occured in Aug 2015 and July 2013.

Facility: PILGRIM
Region: 1 State: MA
Unit: [1] [ ] [ ]
RX Type: [1] GE-3
NRC Notified By: KENNETH GOODALL
HQ OPS Officer: VINCE KLCO
Notification Date: 08/15/2016
Notification Time: 17:48 [ET]
Event Date: 08/15/2016
Event Time: 15:52 [EDT]
Last Update Date: 08/15/2016
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
DON JACKSON (R1DO)

UnitSCRAM CodeRX CRITInitial PWRInitial RX ModeCurrent PWRCurrent RX Mode
1NY70Power Operation62Power Operation
Event Text
SALT SERVICE WATER SYSTEM DECLARED INOPERABLE

"On Monday, August 15, 2016 at 1552 [EDT], with the reactor at [about] 70 percent core thermal power (CTP), Pilgrim Nuclear Power Station (PNPS) entered a 24-hour shutdown Limiting Condition for Operation Action Statement (LCO-AS) for Salt Service Water (SSW) inlet temperature exceeding the Technical Specification (TS) limit in TS 3.5.B.4. The LCO-AS was subsequently exited at 1651 hours when the temperature of SSW trended to below the TS limit.

"Under certain design conditions, the SSW system is required to provide cooling water to various heat exchangers such as the Reactor Building Closed Cooling Water (RBCCW) and Turbine Building Closed Cooling Water (TBCCW) systems. When the inlet temperature to these supplied loads exceeds the 75 degrees F limit established in the TS, the SSW system is conservatively declared inoperable until the temperature trends below this value. This condition existed for approximately 60 minutes.

"The SSW temperature is being closely monitored and trended on a continuous basis.

"This event has no impact on the health and safety of the public.

"The licensee has notified the NRC Senior Resident Inspector.

"This notification is being made in accordance with 10 CFR 50.72(b)(3)(v)(B) and 10 CFR 50.72(b)(3)(v)(D) due to an event or condition that could have prevented fulfillment of a safety function.

"The licensee will be notifying the Commonwealth of Massachusetts Emergency Management Agency."

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