Enformable

Tag: BWR

A Fukushima Lesson Unlearned: NRC scraps public rulemaking on weak GE containments

The United States Nuclear Regulatory Commission (NRC) typically begins its narrative on the “lessons learned” from the Fukushima Daiichi nuclear catastrophe with Japan’s March 11, 2011accident. Not surprisingly, the agency has avoided addressing the most critical lesson recognized in the accident’s official investigative report by Japan’s National Diet. In their finding, the unfolding radiological catastrophe […]

Japan to mandate BWR reactors to install filtered vents after Fukushima disaster

A commissioner of the Nuclear Regulation Authority of Japan told reporters this week that the nation’s boiling water reactors will not be allowed to restart until they have installed filtered ventilation systems to reduce the amount of radioactive materials released from containment systems during nuclear emergencies. “Without this (filtering systems), reactors will not reach the […]

Spain shuts down oldest nuclear reactor

The Garona nuclear power plant is shutting down in order to avoid new taxes that would render the plant unprofitable.  Spain is introducing higher taxes on electricity generation as a measure to address an over 24 billion euro ($31 billion) energy tariff deficit after years of selling power below costs. The operator of the plant […]

April 2nd, 2011 – Justification for recommended actions considering TEPCO desire to limit containment venting based on EPRI and BWROG Severe Accident Management Guideline Basis

From: RST01 Hoc [mallto:[email protected]] Sent: Saturday, April 02, 2011 5:22 AM To: GE Hitachi Nuclear Response Team (GE Power & Water); INPO EmergencyResponseCtr (INPO); Modeen, David; RST03 Hoc; [email protected]; [email protected] Cc: FOIA Response.hoc Resource Subject: Q385 Rev. 4 0400 Q385, Rev. 4, “Justification for recommended actions considering TEPCO desire to limit containment venting based on EPRI […]

Fukushima: The Accident Waiting To Happen

This week, TEPCO released its final report of its internal investigation into the Fukushima nuclear disaster, and admits it failed to adequately prepare for the disaster, but cast blame on the government for adding “unnecessary confusion” to the accident. The report is based on 600 interviews, inspections, and other data, and concludes that the tsunami […]

May 25th, 2012 – FOIA Archive Release – Fukushima Daiichi – Cooling reactors through drywell – How much of Unit 2 core is still in RPV?

Last Updated – 9:50 AM A New Strategy for the Fukushima Daiichi Disaster The Domino Theory (the Plausible Hypothetical Worst Case) is Not Any Longer Credibly Possible – Pages From ML12122A221 IAEA Activities in Response to TheFukushima Accident Report by the Director General Science of Nuclear Safety Post-Fukushima Nuclear Power in aPost-Fukushima World Conditions of […]

March 30th, 2011 – Reactor Status Update – U2 at least some core ex-vessel approx 3/15 – U3 SFP may be unable to fill due to damage

Unit 1 Rx: Shutdown 3/11. 70% core damage. Cooling with 30 gpm. Significant salt deposits in vessel, core spay plugged. Primary pressure 65 psig. Drywell pressure 25 psig. Secondary containment destroyed. Containment has been vented at least once since fuel damage occurred. Attempting to establish Nitrogen purge prior to resuming venting. Unit 2 Rx; Shutdown 3/11. 30% […]

March 16th, 2011 – USAF detects elevated radiation levels from northern tip of Japan to Tokyo

USAF bases at Misawa and Yokota began sampling (3X daily) on Monday, March 14th, 2011 USAF expanded the locations testing to more AFBs and some ANG installations in Korea(3X), Guam(3X), Alaska, Washington(IX daily), Oregon (1X), and California (1X) on Wednesday, March 16th, 2011. We have seen some elevated readings at Yokota and Misawa. AF Radiological Sampling Plan […]

March 28th, 2011 – Media question on US plants using MOX fuel

From: McIntyre. David To: Sheehan. Neil; Burnell, Scott; Brenner, Eliot; Hayden, Elizabeth; Harrington, Holly Subject: RE: Media question on plants using MOX fuel Date: Monday, March 28, 2011 3:40:54 PM Catawba did for a cycle or two back in 2006, I think. TVA has expressed interest, and Columbia was recently revealed to be in discussions […]

March 20th, 2011 – 0500 SPEEDI Fukushima Radiation Maps

From:Hoc, PMT12 Sent:Saturday, March 19, 2011 6:15 PM To:GIS Hoc; PMT01 Hoc Subject:FW: 0500 SPEEDI data, unzipped Attachments: FUKUSHIMAl air doseuiOS-06huj.gif; FUKUSHIMAl air doseui06-07huj.gif; FUKUSHIMAl air doseui07-08huj.gif; FUKUSHIMAl wind(OShuj.gif; UKUSHIMAl air concentrationuiOS-06~(jjgif; FUKUSHIMAl air concentrationui06-07huj.gif;FUKUSHIMAl air concentrationui07 -08huj.gif 0500 SPEEDI data, unzipped. SBU This email is UNCLASSIFIED Jerome Ryan Political Officer U.S. Embassy Tokyo 1-10-5, Akasaka 1-Chome, Minato-Ku, […]

March 12th report says Fukushima Reactor 1 exploded after “vertical earthquake” under unit which did not affect other reactors

USNRC Emergency Operations Center Status Update March 12, 2011 Earthquake / Tsunami Status Update Compiled by Executive Briefing Team Status of Japanese Facilities (This information is compiled from available sources, including press releases by the Tokyo Electric Power Company (TEPCO) and the International Atomic Energy Agency (IAEA)). At 0136 EST on March 12, 2011, a […]

NRC Transcripts – Chuck Casto Re Fukushima Unit 4 – “For me, I’m evermore convinced that there’s nothing there. There’s major damage to that building. And I just have to stake my career on it.”

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION JAPAN’S FUKUSHIMA DAIICHI ET AUDIO FILE WEDNESDAY – MARCH 16, 2011 CHUCK CASTO: For me, I’m evermore convinced that there’s nothing there. There’s major damage to that building. And I just have to stake my career on it. But I don’t see that there’s any structural integrity there […]

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