Edwin Lyman(@NucSafetyUCS) 's Twitter Profileg
Edwin Lyman

@NucSafetyUCS

I'm the Director of Nuclear Power Safety at the Union of Concerned Scientists in Washington, DC. I work to make nuclear power safer and more secure.

ID:1121774093739667458

calendar_today26-04-2019 13:52:40

5,8K Tweets

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76 Following

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Yesterday the Shearon Harris plant in automatically scammed from full power after an electrical fault in an auxiliary transformer occurred. And on Wednesday the North Anna-2 reactor in also scrammed after the neutron flux started to drop.

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This is so lame. Another 'working group' isn't going to solve power's systemic problems. The industry must be disappointed. whitehouse.gov/briefing-room/…

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On Thursday the Quad Cities-2 reactor in automatically scrammed when at reduced power for maintenance after a main turbine stop valve closed. The reactor is back at full power today.

On Thursday the Quad Cities-2 #nuclear reactor in #Illinois automatically scrammed when at reduced power for maintenance after a main turbine stop valve closed. The reactor is back at full power today.
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An NRC security inspection found a failure of the corporate fitness-for-duty program at Entergy plants (River Bend and Waterford in , Grand Gulf in ). Personnel who were flagged for follow-up drug/alcohol testing were not actually tested.

An @NRCgov security inspection found a failure of the corporate fitness-for-duty program at Entergy #nuclear plants (River Bend and Waterford in #Louisiana, Grand Gulf in #Mississippi). Personnel who were flagged for follow-up drug/alcohol testing were not actually tested.
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Yesterday the Perry plant was forced to shut down after the reactor coolant system sprung a 6-gallon-per-minute leak that could not be identified. The reactor remains at zero power today.

Yesterday the Perry #nuclear plant was forced to shut down after the reactor coolant system sprung a 6-gallon-per-minute leak that could not be identified. The reactor remains at zero power today.
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Breaking news: NRC just announced at today's advanced reactor stakeholder meeting that, after receiving two supplements to the original submittal, the agency has accepted the TerraPower application to build a Natrium fast reactor in Kemmerer, for review.

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The craziness just keeps growing ... now the company formerly known as 'Deep Isolation,' which proposed disposing of waste in boreholes, has morphed into 'Deep Fission,' which hopes to put entire light-water micro-reactors in boreholes. nrc.gov/docs/ML2413/ML…

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An NRC inspection found 2 quality assurance violations in NuScale Power's design activities, including failing to use safety-related procedures for calculations on a safety-related system. NuScale is contesting the violations.
nrc.gov/docs/ML2409/ML…
nrc.gov/docs/ML2413/ML…

An @NRCgov inspection found 2 quality assurance violations in @NuScale_Power's design activities, including failing to use safety-related procedures for calculations on a safety-related system. NuScale is contesting the violations. nrc.gov/docs/ML2409/ML… nrc.gov/docs/ML2413/ML…
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An NRC investigation at the Hatch plant in has found that a radiation protection technician falsified radiation and contamination surveys by copying data from previous surveys instead of taking new readings, endangering co-workers. nrc.gov/docs/ML2408/ML…

An @NRCgov investigation at the Hatch #nuclear plant in #Georgia has found that a radiation protection technician falsified radiation and contamination surveys by copying data from previous surveys instead of taking new readings, endangering co-workers. nrc.gov/docs/ML2408/ML…
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On Sunday the Beaver Valley-1 reactor in was manually scrammed at 14 percent power after operators lost control of the water level in one of the steam generators. The reactor is still down this morning.

On Sunday the Beaver Valley-1 #nuclear reactor in #Pennsylvania was manually scrammed at 14 percent power after operators lost control of the water level in one of the steam generators. The reactor is still down this morning.
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A troubling development at . Obviously it would be madness for Russia to attempt to restart the plant for power operation.

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The latest IAEA - International Atomic Energy Agency ⚛️ update from : 'At the Rivne NPP, the IAEA team reported that attacks last week on the electrical power infrastructure elsewhere in Ukraine had resulted in instability in the back-up power lines connected to the plant.'
iaea.org/newscenter/pre…

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Trouble at the D.C. Cook-2 ice-condenser reactor in : Operators had to manually scram the unit yesterday at 20 percent power after 'stable steam generator levels were unable to be maintained' as it was being down-powered to repair a turbine leak.

Trouble at the D.C. Cook-2 ice-condenser #nuclear reactor in #Michigan: Operators had to manually scram the unit yesterday at 20 percent power after 'stable steam generator levels were unable to be maintained' as it was being down-powered to repair a turbine leak.
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Members of the NRC Advisory Committee on Reactor Safeguards are now pointing out that the absence of a physical containment in the TerraPower Natrium fast reactor design is a 'significant departure' from previous expert judgment.

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Quote of the day: Responding to a timeline proposed by industry for a 6-month period from selecting a location for a micro reactor to power operation, an NRC staffer pointed out that 'the permitting process to build a house in Montgomery County is longer than this.'

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