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PROS 2015 Summer Meeting

2015 PROS Meeting will be in Texas.

A NASA tour is planned. You will love the Gulf Coast. Plan your meeting now, and have some fun too.

Read page two. News continues, don't stop on page one.

Farley, Unit 1 LER:B-Train RHR Inoperable for Longer Than Allowed byTechnical Specifications due to Misadjusted

On February 28, 2014 at 1300, with Unit 1 operating at 100 percent themnal power, a lower than expected flow rate in the B-Train Residual Heat Removal (RHR)system was observed while conducting a surveillance test per procedure FNP-1-STP-11.2. Investigation of this condition determined that the low flow rate was a result of previous maintenance perfomned on October 13,2013 to replace an actuator linkage on the B-Train RHR heat exchanger discharge valve, 1El1HCV603B. Analysis of the February 28, 2014 test results determined that the B-train RHR system flow rate was essthan the minimum allowed byTechnical Specifications, rendering the B-TrainRHRsystem inoperable. Since this condition has existed for a time period in excess ofthe applicable Technical Specification Required Action Completion ime, this is a violation ofTechnical Specifications and is reportable per 10 CFR 50.73(a)(2)(i)(B). Since theA-Train of HR has been brieflyinoperable during the period of B-TrainRHR inoperability, this is also reportable per 10 CFR 0.73(a)(2)(v)(B,D).


The Perry Power Plant experienced a reactor scram during a shift of non-essential vital power supply to the alternate source. Feedwater was lost resulting in receiving a valid level 3 and level 2 signal. High Pressure Core Spray and Reactor Core Isolation Cooling started and injected. Reactor level and pressure have been stabilized to required bands. The motor feed pump has been started and is controlling level.


This is an 8-hour notification being made to report that a valid ESF [emergency safety features] auxiliary feed water system actuation occurred. Salem Unit 1 was in mode 1 at 19% reactor power and executed a planned manual reactor trip to begin a scheduled refueling outage (1R23). The 11, 12, and 13 AFW [auxiliary feedwater] pumps were not in service prior to the reactor trip and as a result, narrow range levels in 12, 13, and 14 steam generators reached 14% before recovering. This resulted in a valid ESF actuation for low steam generator water level.


his 60-day telephone notification is provided in accordance with 10 CFR 50.73(a)(1) to report [two separate] invalid actuations of the Unit 4 Safety Injection (SI) System in accordance with 10 CFR 50.73(a)(2)(iv)(A). 


At 0303 [CDT], River Bend Nuclear Station sustained a reactor scram due to high Average Power Range Monitor [APRM] flux, suspected due to a malfunction of the Electrohydraulic Control System. Reactor recirculation pump 'B' tripped, reactor recirculation pump 'A' responded appropriately. All other systems responded appropriately except for loss of feed water due to low suction pressure trip from isolating the condensate demineralizers. Reactor water level did not get out of level band. Condensate demineralizers and feedwater were restored to service. Level 3 [isolation] was initiated due to scram. [One] system, Suppression Pool Cooling isolated accordingly due to level 3 signal. Currently the plant is in mode 3, hot shutdown.


Today at approximately 0250 (EDT) [on 10/12/14], during a planned reactor power ascension with reactor power at approximately 1% of rated thermal power, reactor water level began lowering. Operators inserted a manual SCRAM at 0251 (EDT) in accordance with station procedures.

NRC Schedules Regulatory Conference to Discuss Apparent Violations at Arkansas Nuclear

The Nuclear Regulatory Commission will meet with officials from Entergy Operations on
Oct. 28 to discuss the safety significance of apparent violations related to flood protection which affect both units at Arkansas Nuclear One. The plant, operated by Entergy Operations, Inc., is located in Russellville, Ark.

The NRC evaluates regulatory performance at commercial nuclear plants with a color coded
process that classifies inspection findings as green, white, yellow or red in order of increasing safety significance. The NRC has preliminarily determined that the violations have substantial safety significance, or are “yellow” for both units.

The flooding issue came to light following an incident that occurred at the plant on March
31, 2013. Workers were moving a 525-ton component out of the plant’s turbine building during a maintenance outage when a lifting rig collapsed, causing the component to fall, damaging a fire main in the Unit 1 turbine building. Fire pumps started and pumped water into the building. Some of this water leaked past degraded floor seals and flowed down onto the lowest level of the Unit 1 auxiliary building, covering the floor with two inches of water. Water also entered one of the safety-related pump rooms because a valve in an adjacent hallway was not fully closed.

NRC Returns All Three Browns Ferry Nuclear Units

The Nuclear Regulatory Commission staff has returned all three units at the Browns Ferry
Employees work in the control room at Browns Ferry Nuclear Plant in Athens, Alabama.

nuclear plant to the agency’s normal levels of inspection and oversight for the first time in more than four years.

The Browns Ferry plant is operated by the Tennessee Valley Authority and is located near
Athens, Ala., about 32 miles west of Huntsville.

The increased oversight ended when NRC officials completed an inspection of the most recent
issue at Browns Ferry. It involved staffing needed in the event of an emergency in the plant’s control room. The NRC issued an order confirming actions TVA is taking to address the issue.

The NRC inspection verified that the steps are appropriate to maintain the needed staffing levels and the agency considers the issue closed.

“The Browns Ferry plant has made significant improvements in safety performance,” said NRC
Region II Administrator Victor McCree. “Even though the plant’s three units are returning to normal oversight, we will continue to monitor and inspect the implementation of their improvement plan and the overall safety culture.”

Reactor stopped at Yonggwang Nuclear Power Plant in South Korea

A nuclear reactor at South Korea’s Yonggwang Power Plant is stopped due to cracks in tubes of the steam generator, the plant’s operator Korea Hydro and Nuclear Power reported on Friday.

The nuclear power plant is in south-east of the country, 322 kilometres from the capital city. Inspection of the reactor is underway.

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