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Peach Bottom Letter 2016-403


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Sirens Sound At Beaver Valley

Power Reactor Event Number: 51948
Region: 1 State: PA
Unit: [1] [2] [ ]
RX Type: [1] W-3-LP,[2] W-3-LP
Notification Date: 05/20/2016
Notification Time: 18:40 [ET]
Event Date: 05/20/2016
Event Time: 15:31 [EDT]
Last Update Date: 05/20/2016
Emergency Class: NON EMERGENCY
10 CFR Section: 
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization): 

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
2 N Y 100 Power Operation 100 Power Operatio

Event Text


"At approximately 1531 [EDT] hours, a tornado signal was inadvertently activated from Hancock County, West Virginia which sounded 118 out of 120 Emergency sirens. The remaining 2 sirens do not receive a tornado signal. The sirens alarmed for approximately 3 minutes. A silent test was subsequently performed for all 120 sirens and validated the emergency siren system remains functional. 

"In accordance with 10 CFR 50.72(b)(2)(xi), News Release or Notification of Other Government Agency, a 4 hour notification is required. 

"The [NRC] Senior Resident Inspector has been notified. No press releases are planned." 

The licensee notified state and local agencies.

NRC to Hold Meeting with Exelon on May 26 in Stafford Township, N.J., Regarding Performance of Oyster Creek Nuclear Power Plant

No. I-16-016

May 20, 2016


Diane Screnci, 610-337-5330
Neil Sheehan, 610-337-5331

NRC to Hold Meeting with Exelon on May 26 in Stafford Township, N.J., Regarding Performance of Oyster Creek Nuclear Power Plant

The Nuclear Regulatory Commission will share information on its annual assessment of safety performance at the Oyster Creek nuclear power plant during a public meeting on Thursday, May 26, in the Manahawkin section of Stafford Township, N.J.

The meeting is scheduled to begin at 6 p.m. at the Holiday Inn Manahawkin, at 151 Route 72 West, in Stafford. During the session, NRC staff will answer questions on the plant’s performance and the agency’s oversight activities at the Lacey Township, N.J., plant, which is owned and operated by Exelon.

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PA DEP News Release : Wolf Administration Investing $25.1 Million in Projects to Protect and Improve Pennsylvania Water Resources

Dept. of Environmental Protection
Commonwealth News Bureau
Room 308, Main Capitol Building
Harrisburg PA., 17120


Neil Shader
Jeff Sheridan

Wolf Administration Investing $25.1 Million in Projects to Protect and Improve Pennsylvania Water Resources

Pennsylvania Governor Tom Wolf announced today the selection of 114 projects to receive $25,143,294 in funding from Department of Environmental Protection (DEP), for the protection of Pennsylvania’s water resources. The selected projects enhance watersheds, mitigate acid mine drainage, and support water pollution cleanup programs.

“The Growing Greener program, and this year’s funding, is an investment in our future and proof that when state government works collaboratively, we achieve long-lasting results,” said Governor Wolf. “The Environmental Stewardship Fund has helped spark innovation and coordinate partnerships to tackle some of the most challenging environmental issues in our state.”

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Our colleague and friend, Michael Mariotte - Dec. 9, 1952 – May 16, 2016


           Apologies for multiple posts—You were on Michael’s Nov 2014 LIFETIME ACHEIVEMENT AWARDS LIST Nuclear Information and Resource Service) result for michael mariotte at nirs photo

Dear Friends of NIRS,

We have very sad news to share. Our colleague and friend, and longtime leader, Michael Mariotte died yesterday. As you all know, he has waged a brave struggle against pancreatic cancer for three years, but we understand that this could still come as a surprise. It has hit us all very hard. Michael's condition worsened very quickly over the last couple of weeks, and even more so in recent days. He was so committed to our work, that he continued right up until the last week or so, giving many the impression that he was going strong.

Though the last few months were very difficult for him, he died peacefully at home and his family was with him. He is survived by his wife Tanya, their young daughters Zoryana and Kateryna, his friend and ex-wife Lynn, and their children Nicole and Richard, as well as his sister Julie, brother Jeff, and sister-in-law Marsheila.

Michael did not want to have a funeral - it was not his way. Rather, he has asked friends to gather and do something fun in his memory. That was his way, to honor life by living and enjoying it to the fullest.

And, of course, by fighting for it. Most of us know him originally and primarily as both parts colleague and comrade, in our work to protect life and to make the world a safer, better, and more just place in which to live.

PLEASE JOIN Michael’s family, music and work colleagues, friends, neighbors and all to hug, cry, and share memories at the

Hyattsville BUSBOYS and POETS, 5331 Baltimore Avenue, Hyattsville, MD 20781
Gathering Thursday MAY 19th from 4:00 -8:00 PM
with the Program beginning at ~ 5:30.

We are also planning to have an event in a month or so, to give the wider NIRS community an opportunity to come together and celebrate Michael and his work, and to chart our path forward. We have a lot of work to do, and Michael would not have wanted us to skip a beat. One of the last things we spoke about on Friday was the latest reactor closure announced last week -- Fort Calhoun, in Nebraska. He knew the struggle had to go on without him, and was glad to know one more reactor is shutting down.

If you would like to send a message of support to his family, we encourage you to do so. Michael's family has a lot to deal with in the wake of their loss, so NIRS has offered to collect and pass on messages from the activist community. We will be collecting posts from Facebook, which is already filling up with wonderful messages. You can also send an email to us at, or a card or letter to NIRS's office: 6930 Carroll Ave., Suite 340, Takoma Park, MD 20912.

We will be posting a public statement shortly, and notifying the broader community of NIRS supporters and activists. Please feel free to let people in your networks know.
We know this is difficult news. So many of you were much more than colleagues. If you have any questions, don't hesitate to contact us.

With deep regret, warmest regards, and lots of spunk,

Tim Judson, Executive Director
on behalf of NIRS Staff and Board of Directors

Diane D'Arrigo, Radioactive Waste Project Director
Denise Jakobsberg, Administrative Coordinator
Mary Olson, Southeast Director

Chris Williams, Board Chair
Timothea Howard, Treasurer
Susan Alzner                                                                                                                          
Louis Clark
Peer de Rijk, WISE-International
Bob Eye
Allison Fisher
Daphne Wysham
Elizabeth May, ex officio
Vladimir Sliviak, ex officio

NRC to Hold Open House on May 23 in Limerick, Pa., to Discuss 2015 Performance of Limerick Nuclear Power Plant

Nuclear Regulatory Commission - Press Release

No. I-16-015 May 16, 2016
Contact: Diane Screnci, 610-337-5330 Neil Sheehan, 610-337-5331
NRC to Hold Open House on May 23 in Limerick, Pa., to Discuss 2015 Performance of Limerick Nuclear Power Plant

The Nuclear Regulatory Commission will conduct an open house on Monday, May 23, in Limerick, Pa., to discuss the agency’s annual review of safety performance at the Limerick nuclear power plant.

NRC staff will be at the Limerick Township Municipal Building, at 646 W. Ridge Pike, from 5 - 6:30 p.m. to discuss the plant’s performance in 2015 and the agency’s oversight plans for the remainder of 2016. On hand will be agency employees responsible for inspections of the plant, including the resident inspectors who are based full-time at the plant.

The NRC’s Reactor Oversight Process is the foundational program that enables the agency to successfully complete its mission of assessing plant safety. Under that program, the NRC gauges plant performance through the use of color-coded inspection findings and performance indicators, which are statistical measurements of plant performance that can trigger additional oversight if exceeded.

Based on its 2015 reviews, the NRC determined that the Limerick nuclear plant, which is owned by Exelon and is the site of two boiling-water reactors, operated safely during 2015. As of the end of last year, Limerick Units 1 and 2 had no inspection findings that were “greater than green” or no performance indicators that were other than “green” (very low safety significance) and will therefore receive the NRC’s normal battery of reviews, barring any changes.

The NRC’s normal level of oversight at each U.S. nuclear power plant involves thousands of hours of inspection. In 2015, the agency devoted approximately 5,300 hours of review at Limerick.

“Our Annual Assessments allow us to step back at regular intervals and size up plant performance. However, we view oversight of each facility as an ongoing responsibility,” Acting NRC Region I Administrator David Lew said. “In the case of Limerick, the plant’s current performance qualifies for our normal level of oversight.”

The NRC issues reports on performance at each plant twice a year: during the mid-cycle, or mid-point, of the year, and at the conclusion of the year. Inspection findings and performance indicators are also updated on a quarterly basis on the agency’s website. Following the release of the Annual Assessment letters each March, the NRC meets with the public in the vicinity of each plant to discuss the results. Normal inspections are carried out by the two resident inspectors assigned to Limerick. Reviews are also performed at the sites by specialist inspectors on a periodic basis.

Among the areas to be inspected this year at Limerick are radiological safety, fire protection and the plant’s problem identification and resolution program. In addition, the NRC will inspect the plant’s dry cask storage facility for spent nuclear fuel.

The Annual Assessment letter for Limerick, as well as the notice for the May 23 open house, are available on the NRC website. Current performance information is also available for Limerick Unit 1 and Unit 2.

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NRC Issues Confirmatory Order to Entergy Regarding Palisades Nuclear Plant

No: III-16-010

May 16, 2016

CONTACT: Viktoria Mitlyng 630-829-9662
                   Prema Chandrathil 630-829-9663

NRC Issues Confirmatory Order to Entergy Regarding Palisades Nuclear Plant

The Nuclear Regulatory Commission has issued a Confirmatory Order to Entergy Nuclear Operations Inc. under which the company will perform a series of actions to address failures in handling a leak from the safety injection refueling water tank (SIRWT) into the control room at the Palisades Nuclear Plant.

The plant is located in Covert, Mich., five miles south of South Haven.

The order stems from a settlement reached under the NRC’s alternative dispute resolution (ADR) process requested by plant-owner Entergy to address the violations identified in the NRC’s investigation. The violations are connected to the discovery of leakage from the plant’s control room ceiling on May 18, 2011.

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NRC Schedules Meeting with TVA to Discuss Watts Bar Work Environment Improvement Plan

Nuclear Regulatory Commission - Press Release
No: II-16-030 May 16, 2016
CONTACT: Roger Hannah 404-997-4417
Joey Ledford 404-997-4416

NRC Schedules Meeting with TVA to Discuss Watts Bar Work Environment Improvement Plan
The Nuclear Regulatory Commission staff has scheduled a meeting with Tennessee Valley Authority officials for Tuesday, May 24, to discuss TVA’s response to an NRC “chilling effect” letter issued in March to the Watts Bar nuclear plant.

The plant is located near Spring City, Tenn., about 60 miles southwest of Knoxville.

The NRC had found that some operations employees may not have felt free to raise safety concerns, and some licensed operators may have been unduly influenced and directed by sources external to the control room. That hesitancy to raise concerns is what the NRC calls a chilling effect.

The NRC met with Watts Bar officials on March 22 and issued the letter on March 23. That letter requested a response outlining what TVA is doing to address the concerns.

During the May 24 meeting, the Watts Bar staff plans to brief the NRC on the current status and progress of actions to improve the chilled work environment in the operations department at the plant.

The meeting is scheduled to be held in the NRC’s Region II office at 245 Peachtree Center Avenue NE in Atlanta at 10 a.m.

The public may observe the meeting and NRC officials will be available after the business portion to answer any questions. For people unable to attend, a toll-free teleconference line will be available. Anyone wishing to listen to the meeting should contact Alan Blamey by May 23 at 404-997- 4415 or

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PA nuke scrammed

This is misleading because it claims all safety systems responded the way they were supposed to. However the high pressure injection system was inoperable (although not called upon). This is how accident get started.

Power Reactor    Event Number: 51925
Region: 1 State: PA
Unit: [ ] [2] [ ]
RX Type: [1] GE-4,[2] GE-4
HQ OPS Officer: HOWIE CROUCH    Notification Date: 05/13/2016
Notification Time: 05:00 [ET]
Event Date: 05/13/2016
Event Time: 01:10 [EDT]
Last Update Date: 05/13/2016
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
50.72(b)(2)(iv)(A) - ECCS INJECTION
Person (Organization):

Unit    SCRAM Code    RX CRIT    Initial PWR    Initial RX Mode    Current PWR    Current RX Mode
2    M/R    Y    100    Power Operation    0    Hot Shutdown
Event Text

"At approximately 0110 hours [EDT] on May 13, 2016, Susquehanna Steam Electric Station Unit Two reactor was manually scrammed by plant operators due to a sustained loss of AC power to essential plant loads. Power to MCC 2B246 was lost at 2355 on May 12, 2016, resulting in a loss of Drywell cooling. Drywell pressure increased to 1.3 psig when operators placed the mode switch to the shutdown position to manually SCRAM the reactor. All rods inserted as expected. Reactor water level lowered to -27 inches and was immediately restored by normal feedwater level control. Level 3 (+13 inch) PCIS isolations occurred, along with an initiation of the RCIC system (-30 inches). Once adequate level was verified, RCIC was overridden. Pressure was controlled with turbine bypass valves, and subsequently main steam line drains. All safety systems functioned as expected.

"The power loss also tripped Reactor Building HVAC, causing a loss of secondary containment differential pressure resulting in a loss of safety function.

"Due to the loss of drywell cooling, high drywell pressure actuations and a second reactor SCRAM signal, this signal was automatic, occurred at 0314 hours. HPCI [which automatically initiated on high drywell pressure] was subsequently overridden and declared inoperable, resulting in a loss of safety function. [HPCI did not inject into the vessel].

"The reactor is currently stable in Mode 3. Initial reports from the field indicate a phase to phase fault on the MCC 2B246 bus bars."

The licensee has notified the NRC Resident Inspector and will be issuing a press release.

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