NRC wants information on nuclear plants' power system designs

The Nuclear Regulatory Commission (NRC) issued a bulletin to all nuclear power plant licensees requesting information about their electric power system designs and alerting them to a potential design vulnerability that could affect the operation of key safety equipment.

The NRC issued Information Notice 2012-03 on March 1 to inform licensees of the loss of one of three phases of the offsite power circuit, including an event at Byron nuclear power plant in Illinois on January 30. A loss of off-site power happened at the 1,136 MW Unit 2 due to an unbalanced voltage entering the onsite power distribution system from the transmission network. The plant’s electric power system’s protection scheme was not designed to sense the loss of one of three power phases and automatically trip circuits to isolate the degraded outside power source and switch to emergency backup power. The degraded offsite power source could have damaged the plant’s emergency core cooling system, NRC said in a statement. The unit was brought back online Feb. 7.

NRC regulations and plant technical specifications require reliable off-site and onsite power systems with sufficient capacity and capability to operate safety-related systems. Therefore, the NRC staff is seeking information to verify compliance with existing regulations and plant-specific licensing bases. The staff will use the information it receives to determine if further regulatory action is needed.

The bulletin requests licensees to provide information on their electric system designs within 90 days. It applies to all 104 currently operating commercial power reactors and the four combined licenses for new reactors issued earlier this year.

To read the bulletin, click here.

Subscribe to Nuclear Power International magazine

Sponsored by FLSmidth

Related Articles

Nuclear Power International’s Top Stories of 2014

Brazil Eletrobras Eletronuclear Angra 3 nuclear power plant Areva contract services euros

Areva awarded $89mn contract for nuclear reactor work in Brazil

Areva was awarded a 75 million euros ($89.6 million) contract for the 1,405-MW Angra 3 nuclear power project in Brazil.

Follow Power Engineering on Twitter
Latest News

S. Africa court dismisses Westinghouse nuclear generator replacement dispute

A South African court dismissed a filing from Westinghouse Electric Co. asking to reopen bidd...

IAEA urges India to tighten nuclear safety regulations

The International Atomic Energy Agency (IAEA) is pressing India to tighten its nuclear safety...

Caterpillar's C280 Genset enters China offshore market

Caterpillar Oil & Gas will supply six of its Cat C280-16 offshore generator sets (gensets...

Justices divided over EPA mercury limits

The Supreme Court's conservative justices cast doubt on the Obama administration's first-ever...

Report: Global wind power installations increased by 42% in 2014

Global wind power installations grew 42 percent year-over-year, according to a new report con...

Low carbon standard passes Ill. Senate committee

An Illinois Senate committee passed a bill that would establish a low carbon standard that wo...

Russia to build two nuclear power reactors in Jordan for $10bn

Russia signed a $10 billion deal to build Jordan’s first nuclear power plant.

Iowa top officials on opposites sides in EPA lawsuit

Iowa's governor and attorney general were on opposite sides of a case argued Wednesday at the...

Power Engineering Current Issue

12/01/2014
Volume 118, Issue 12
1412pe-cover1
Products Showcase
Dynamic Fluoride Ion cleaning DFIC of industrial natural gas turbines Hi-Tech Furnace Systems

Dynamic Fluoride Ion Cleaning of IGT Parts

The Dynamic Fluoride Ion Cleaning (DFIC) Process from Hi-Tech Furnace Systems is able to clean deep, narrow cracks of oxides by cycling between negative, atmospheric, and positive pressure.

Archived Articles

2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013

Buyers Guide Categories

Power Industry Wire News

Earthstone Energy, Inc. Reports Fourth Quarter and Full Year 2014 Results

Earthstone Energy, Inc. Reports Fourth Quarter and Full Year 2014 Results

Chicago's Lakeshore Recycling Systems Helps Change a Life on March 27 Airing of the Steve Harvey Show

Chicago's Lakeshore Recycling Systems Helps Change a Life on March 27 Airing of the Ste...

East West Petroleum Corp.'s CEO David Sidoo Interviewed by The Energy Report

East West Petroleum Corp.'s CEO David Sidoo Interviewed by The Energy Report

Perma-Fix Schedules Fourth Quarter 2014 Earnings Conference Call

Perma-Fix Schedules Fourth Quarter 2014 Earnings Conference Call

Murray Energy's Controlling Interest of Foresight Creates U.S. Coal Mining Giant, an Industrial Info News Alert

Murray Energy's Controlling Interest of Foresight Creates U.S. Coal Mining Giant, an In...

Power Engineering

Article Archives for Power Engineering Magazine

Continuing Education

Professional Development Hours

To access a course listing associated to a specific topic listed below, click on the topic of choice from the list below.

Latest Energy Jobs

View more Job Listings >>