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Hydrogen levels quintuple at Reactor No. 2 in last two weeks

Hydrogen Density of Primary Containment Vessel at Reactor No. 2:

March 11 @ 0.06%* March 16 @ 0.11% March 22 @ 0.18% March 24 @ 0.25% March 26 @ 0.30%

*Hydrogen density before the recent rise remained relatively consistent for months, ranging between 0.04% and 0.08%

Tepco handout link: http://www.tepco.co.jp/en/nu/fukushima-np/images/handouts_120326_06-e.pdf

 

. . . → Read More: Hydrogen levels quintuple at Reactor No. 2 in last two weeks

NHK: Water level “far lower than previously thought” at Reactor No. 2 — Just two feet deep — Anticipated it was 5 times higher — Decommissioning reactor could be “much more difficult” (PHOTO)

enenews_ 2012-03-26 12.50tt

Title: TEPCO: Just 60cm of water in Fukushima reactor Source: NHK World Date: March 26, 2012 at 21:40 JST

Tokyo Electric Power Company says it has found that the cooling water in one of the damaged reactors at Fukushima is only 60 centimeters deep, far lower than previously thought. [...]

TEPCO had thought that . . . → Read More: NHK: Water level “far lower than previously thought” at Reactor No. 2 — Just two feet deep — Anticipated it was 5 times higher — Decommissioning reactor could be “much more difficult” (PHOTO)

Hydrogen levels quadruple at Reactor No. 2 in last two weeks

enenews_ 2012-03-24 17.12tt

Hydrogen Density of Primary Containment Vessel at Reactor No. 2:

March 11 @ 0.06%* March 16 @ 0.11% March 22 @ 0.18% March 24 @ 0.25%

*Hydrogen density before the recent rise remained relatively consistent for months, ranging between 0.04% and 0.08%

Tepco handout link: http://www.tepco.co.jp/en/nu/fukushima-np/images/handouts_120324_01-e.pdf

 

Follow-up to:

. . . → Read More: Hydrogen levels quadruple at Reactor No. 2 in last two weeks

Now hydrogen levels triple at Reactor No. 2 in recent days

Hydrogen Density of Primary Containment Vessel:

March 11 @ 0.06% March 16 @ 0.11% March 22 @ 0.18%

Title: Plant Status of Fukushima Daiichi Nuclear Power Station Source: Tepco Press Handout Date: March 22, 2012

Read the report here

Follow-up to: Hydrogen levels nearly double at Reactor No. 2 in recent . . . → Read More: Now hydrogen levels triple at Reactor No. 2 in recent days

Reactor No. 2 temperature near 80°C — Up almost 20°C in a week (CHART)

enenews_ 2012-03-21 20.23t

UPDATE: Now hydrogen levels triple at Reactor No. 2 in recent days

March 15 – 21, 2012 Reactor No. 2 Data

h/t Fukushima Diary

“If the temperature is confirmed to exceed 80 degrees, it will not meet the condition for the government’s definition of the state of a cold shutdown” -Asahi

Blue line is . . . → Read More: Reactor No. 2 temperature near 80°C — Up almost 20°C in a week (CHART)

Japan Times article refers to possibility of fuel melting through containment vessels — Also known as ‘China Syndrome’ — Architect wants to build shrines over Fukushima units to “pacify a malevolent god”

Title: Plan to N-shrine reactors for millennia Source: The Japan Times Author: EDAN CORKILL Date: Sunday, March 18, 2012 Emphasis Added

Long-term plan: Architect Katsuhiro Miyamoto’s novel means of safely mothballing the Fukushima No. 1 nuclear power plant, and the highly radioactive fuel likely to remain there even after the current crisis is . . . → Read More: Japan Times article refers to possibility of fuel melting through containment vessels — Also known as ‘China Syndrome’ — Architect wants to build shrines over Fukushima units to “pacify a malevolent god”

CBS: “The worst case scenario was happening” at Fukushima — Cores may have burned into earth, releasing untold amounts of radiation if not for sea water injection — You really won’t know what happened until you see inside, says NRC (VIDEO)

Title: U.S. nuclear expert recounts Fukushima disaster Source: CBS News Date: March 16, 2012

[...] One of the experts sent into the emergency is Charles Casto. He’s a former nuclear plant operator working for the U.S. Nuclear Regulatory Commission. He was America’s top expert at the scene [...]

Casto’s team reported to Washington in . . . → Read More: CBS: “The worst case scenario was happening” at Fukushima — Cores may have burned into earth, releasing untold amounts of radiation if not for sea water injection — You really won’t know what happened until you see inside, says NRC (VIDEO)

Hydrogen levels nearly double at Reactor No. 2 in recent days

Hydrogen Density of Primary Containment Vessel:

March 11 @ 0.06% March 16 @ 0.11%

Title: Plant Status of Fukushima Daiichi Nuclear Power Station Source: Tepco Press Handout Date: March 16, 2012

Read the report . . . → Read More: Hydrogen levels nearly double at Reactor No. 2 in recent days

Tepco Survey: 160 milliSv/h from water in Reactor No. 2 — Paint color “may have changed due to accident”

toruspaintt

Title: No cracks or strains seen in suppression chamber of No. 2 reactor at Fukushima plant Source: The Mainichi Daily News Date: March 15, 2012

[...] TEPCO employees entered the basement mezzanine of the reactor building at the No. 2 reactor on March 14 and confirmed that the doors to the “torus” could be . . . → Read More: Tepco Survey: 160 milliSv/h from water in Reactor No. 2 — Paint color “may have changed due to accident”

NHK: Radiation levels too high for humans to continue at Reactors No. 2 and 3 — Workers must repair damage to suppression chambers (VIDEO)

Title: Radiation high near suppression chambers Source: NHK Date: Thursday, March 15, 2012 12:42 +0900 (JST)

High levels of radiation have been detected near suppression chambers of 2 of the reactors at the Fukushima Daiichi nuclear plant.

The radiation levels are too high for workers to continue inspections.

Decommissioning the plant’s crippled reactors involves . . . → Read More: NHK: Radiation levels too high for humans to continue at Reactors No. 2 and 3 — Workers must repair damage to suppression chambers (VIDEO)

“Are people going to drop dead?” US officials surprised workers still at Fukushima after assessment No. 2 went ex-vessel and 400 milliSv/h dose measured

Japan’s Fukushima Daiichi ET Audio File Nuclear Regulatory Commission March 15, 2011

DAVID: And the notion that Unit 2 is X vessel is something that is the the assessment of Jim Trapp, who’s in the office talking to one NISA engineer, so that, that’s their best estimate of what the situation is. But we . . . → Read More: “Are people going to drop dead?” US officials surprised workers still at Fukushima after assessment No. 2 went ex-vessel and 400 milliSv/h dose measured

Asahi: 220 milliSv/hr on TOP level of Unit No. 2 — ‘Puddles’ on floor of reactor ‘believed’ not to be from accident (PHOTO)

puddles

Title: Robot detects high radiation level in No. 2 reactor Source: AJW by The Asahi Shimbun Date: February 29, 2012

Quince 2, a robot searching the top floor of the crippled No. 2 reactor building of the Fukushima No. 1 nuclear power plant, detected radiation levels as high as 220 millisieverts per hour, Tokyo . . . → Read More: Asahi: 220 milliSv/hr on TOP level of Unit No. 2 — ‘Puddles’ on floor of reactor ‘believed’ not to be from accident (PHOTO)

New Asahi doc: NISA team knew of triple meltdowns by March 18 — Kept secret until Tepco’s admission two months later — Says melted fuel only ‘largely’ submerged in water

Title: NISA’s ad hoc team pointed to reactor meltdowns earlySource: – AJW by The Asahi ShimbunAuthor: By TATSUYUKI KOBORI/ Staff WriterDate: March 04, 2012

According to documents that The Asahi Shimbun obtained through a freedom-of-information request Two months before it was made public that fuel melted in three reactors at the Fukushima No. 1 . . . → Read More: New Asahi doc: NISA team knew of triple meltdowns by March 18 — Kept secret until Tepco’s admission two months later — Says melted fuel only ‘largely’ submerged in water

AUDIO: US gov’t experts think melted fuel rods landed in water under Reactor No. 2, causing STEAM explosion — Pressure dropped dramatically at same time — Clear indications primary containment lost

Title: NRC’s Operation Center Fukushima Transcript Source: NRC Date: March 14, 2011 Emphasis Added

TONY ULSES: Yeah, there was some confusing information about that, but I think the bottom line is they’re not comfortable that they have containment for Unit 2.

JIM TRAPP: So they didn’t tell us it their X vessel, but . . . → Read More: AUDIO: US gov’t experts think melted fuel rods landed in water under Reactor No. 2, causing STEAM explosion — Pressure dropped dramatically at same time — Clear indications primary containment lost

NYTimes flashback: Broken pieces of nuclear fuel rods found outside Reactor No. 2, says nuke executive — Covered up by bulldozers

enenews_ 2012-02-25 12.21t

Follow-up to yesterday’s report: PBS: “U.S. surveillance now suggested that there were flakes of deadly radioactive fuel scattered around the reactors” at Fukushima plant — U.S. made secret plans to evacuate all citizens from Japan (VIDEO)

Title: Japan Is Struck by Powerful Aftershock Source: New York Times Authors: HIROKO TABUCHI and ANDREW POLLACK Date: . . . → Read More: NYTimes flashback: Broken pieces of nuclear fuel rods found outside Reactor No. 2, says nuke executive — Covered up by bulldozers

Reactor No. 2 rises above 50°C, was 29°C on Monday — All gauges at bottom of RPV show distinct increase — Same area as ‘faulty’ thermometer

Title: Temperature of the RPV Bottom at Unit 2, Fukushima Daiichi (1F) NPS Source: Tepco Date: Feb 24, 2012

Temperature of the RPV bottom (upper bottom head) at Unit 2, Fukushima Daiichi, TE-2-3-69H2 (135°) 2/20 05:00 @ 29.7°C 2/23 23:00 @ 50.3°C

The other gauge at the bottom is heating up as well, rising . . . → Read More: Reactor No. 2 rises above 50°C, was 29°C on Monday — All gauges at bottom of RPV show distinct increase — Same area as ‘faulty’ thermometer

Again? Temperature up 20°C at Reactor No. 2 RPV in last 3 days — Other gauges at also rising (CHART)

Title: TEPCO faces another potentially broken temperature gauge at Fukushima Reactor 2 Source: Enformable Date: Feb 23, 2012

The temperature of unit 2′s RPV bottom rose by 11.5°C in 24 hours reaching 47.8°C at 11:00 AM on Thursday, while the temperatures from the RPV supporting skirt have also risen nearly 10°C over the last . . . → Read More: Again? Temperature up 20°C at Reactor No. 2 RPV in last 3 days — Other gauges at also rising (CHART)

Temperature drops to 2°C from 220°C at Reactor No. 2 — Only since decrease is gauge failure indicated on Tepco data

enenews_ 2012-02-16 09.12t

Temperature of the RPV Bottom at Unit 2, Fukushima Daiichi (1F) NPS:

[Note *2]

Tepco no longer monitoring thermometer — Temperature remains steady around 220°C — Will stop added water injections if gov’t says it’s reasonable

Title: TEPCO reports reactor thermometer problem to govt Source: NHK Date: Thursday, February 16, 2012 17:28 +0900 (JST)

[...] Tokyo Electric Power Company, or TEPCO, reported the analysis of the problem at the Number 2 reactor to the government’s nuclear safety agency on Thursday. [...] 

The utility said it’s highly unlikely that temperatures could . . . → Read More: Tepco no longer monitoring thermometer — Temperature remains steady around 220°C — Will stop added water injections if gov’t says it’s reasonable

Reactor No. 2 temperature steadily trending downward — Is gauge broken?

Temperature at bottom of Reactor No. 2 pressure vessel, via Tepco handout:

EX-SKF adds: It doesn’t look like the behavior of a thermocouple that has been broken, but what would I . . . → Read More: Reactor No. 2 temperature steadily trending downward — Is gauge broken?

WSJ: Troubling questions raised by thermometer at No. 2 — No wonder things are breaking down at Fukushima after meltdowns, explosions, tsunami, quake (saltwater and boric acid, too)

Title: Faulty Thermometer Behind Temperature Rise at Fukushima Daiichi Source: Wall Street Journal Author: Phred Dvorak Date: February 15, 2012, 10:59 AM JST

[...] a faulty thermometer at No. 2 raises troubling questions. With all the punishment Fukushima Daiichi’s equipment has gone through –- nuclear meltdowns and explosions, not to mention the magnitude 9 . . . → Read More: WSJ: Troubling questions raised by thermometer at No. 2 — No wonder things are breaking down at Fukushima after meltdowns, explosions, tsunami, quake (saltwater and boric acid, too)

Mainichi: Malfunction casts doubt on ‘cold shutdown’ and condition of reactor cores — Japan Nuclear Expert: Will be much more serious if last two sensors fail; Unable to install new ones

Somehow missed this report from yesterday, though still relevant 24 hours later Title: Possible sensor failure throws Fukushima reactor temp. data into doubt Source: The Mainichi Daily News Date: February 13, 2012

[...] the very fact that the sensor may have malfunctioned casts doubt on the cold shutdowns of reactors No. 1-3, declared by . . . → Read More: Mainichi: Malfunction casts doubt on ‘cold shutdown’ and condition of reactor cores — Japan Nuclear Expert: Will be much more serious if last two sensors fail; Unable to install new ones