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

American wind power rebounds in 2014, but stable policy still needed

The fourth quarter 2014 wind energy industry report released yesterday by the American Wind E...

Weekly Coal Production Report

The Weekly Coal Production Report has been updated for the week ended January 24, 2015.

Hawaii energy executives tell lawmakers plans for takeover

An official at NextEra Energy told Hawaii lawmakers that his company does not plan to lay off...

Dominion seeks rate freeze against opposition on many fronts

Virginia's biggest electric utility wants to weaken state oversight of its rates, saying the ...

GE to supply turbines for wind power project in China

GE (NYSE: GE) will supply 55 units of its 2.75-120 brilliant wind turbines to Huaneng Corp.’s...
Renewable Roundtable Discussion

Power Engineering Photo of the Day

Company to supply doors to Chernobyl nuclear plant site

Groupe Gorge, through its subsidiary, Baumert, won a new order to supply technical doors to t...

Siemens to maintain California natural gas-fired power plant

Siemens (NYSE: SI) was awarded a long-term service agreement for the 507-MW Blythe Energy Cen...

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

Forbes Magazine Ranks Precision Frac #4

Forbes Magazine Ranks Precision Frac #4

Vectren to Discuss 2014 Results and 2015 Outlook on Conference Call

Vectren to Discuss 2014 Results and 2015 Outlook on Conference Call

Vectren Declares Quarterly Dividend

Vectren Declares Quarterly Dividend

NV5 Appoints Francois Tardan to Board of Directors

NV5 Appoints Francois Tardan to Board of Directors

Enbridge Energy Partners, L.P. Confirms Distribution Increase for Fourth Quarter 2014

Enbridge Energy Partners, L.P. Confirms Distribution Increase for Fourth Quarter 2014

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 >>