October 16, 2013
PLYMOUTH — Depending on your perspective, Monday’s shut down of the Pilgrim Nuclear Power Station was either another example of the plant’s “defense in depth” safety or additional evidence of its vulnerability.
The press release from Pilgrim arrived just after 10 a.m. Tuesday morning, Oct. 15, and referenced a successful scram (sudden shutdown) of the reactor at 9:21 p.m. the previous evening. According to Pilgrim spokesman Carol Wightman, “Pilgrim Station automatically shut down due to the loss of one of the two 345-kV lines that provides offsite power to the plant.”
October 15, 2013
Shutdowns at Pilgrim in 2013
Jan. 10: Trip of both recirculation pumps. Returned to full power on Jan. 17.
Jan. 20: Leak in a safety-relief valve. Returned to full power on Jan. 24.
Feb. 8: Offsite power loss and main generator load reject. Returned to full power on Feb. 16.
April 18: Refueling. Returned to full power on June 3.
Aug. 22: Electrical problems with water pumps. The plant restarted on Aug. 26, but was shut down by a steam leak on Sept. 8 before reaching full power. Returned to full power on Sept. 21.
Oct. 14: Loss of offsite power.
Source: Nuclear Regulatory Commission
Compiled by Dave Lochbaum, Union of Concerned Scientists – A 36-page printout of events that have occurred at Pilgrim, spanning from 1965 to May 2013.* Pilgrim Events (PDF)
*Important Note: This report contains information about events that happened – not events that did not happen. In other words, just because an event is NOT listed in this report does not mean it did not happen. It might be that the ongoing research effort that yielded this report has not yet recorded the event.
Pilgrim Risks: Accidents and Daily Operations (PDF)
Table of Contents
Pilgrim: How Boiling Water Reactors Work 1
Spent Fuel Storage -Pool Fires 2
Containment Failure: Vent & Hydrogen Explosions 5
Pilgrim- Electric Reliability 10
Emergency Planning 12
Post Accident Cleanup 16
Risks From Daily Operations
Radiation Health Impacts 17
Marine Impacts 29
NRC Oversight- Public Participation- Alternatives
NRC Oversight 30
Public Participation 31
Do We Need Pilgrim’s Electric Power? 32
BWRs actually boil the water. In both types, water is converted to steam, and then recycled back into water by a part called the condenser, to be used again in the heat process.
Since radioactive materials can be dangerous, nuclear power plants have many safety systems to protect workers, the public, and the environment. These safety systems include shutting the reactor down quickly and stopping the fission process, systems to cool the reactor down and carry heat away from it, and barriers to contain the radioactivity and prevent it from escaping into the environment. Radioactive materials, if not used properly, can damage human cells or even cause cancer over long periods of time.
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