Tag "nitrogen"

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Plant hazard

[Column] 3 facts to support the hypothesis that fractured nuclear fuel is in individual stages of nuclear reaction

This is not a widely known fact but 12/17/2012 was a historical day of Fukushima plant. In the evening of that day, the RPV temperature want higher than the temperature

Core removing struggle

Hydrogen concentration in reactor1 is increasing

According to plant parameter released by Tepco, hydrogen concentration in PCV of reactor1 is increasing since 5AM of 12/8/2012. At 9:10 of 12/7/2012, Tepco restarted the nitrogen gas injection into

Core removing struggle

Tepco reported they don’t know why nitrogen injection decreases the temperature of reactor1

According to the minutes of mid/long term Fukushima measures meeting held on 10/22/2012, Tepco is not sure about why nitrogen injection decreases the temperature of PCV in reactor1. Fukushima Diary

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Tepco injected nitrogen gas into reactor2 and 3 as well

On 10/23/2012, Fukushima Diary reported Tepco started injecting nitrogen gas into suppression chamber of reactor1 to avoid the risk of explosion. [Link] According to Tepco’s report “Mid/long term roadmap of

Core removing struggle

Hydrogen concentration rapidly increased in PCV reactor1

Tepco has been injecting nitrogen gas into suppression chamber of reactor1 since 10/23/2012. (cf. To avoid the risk of explosion, Tepco is to inject nitrogen gas to suppression chamber of

Core removing struggle

[Column] Is Tepco injecting liquid nitrogen into reactor1 ?

<This is a column of my guess. Not an article with solid source.>   Since the end of September, Fukushima Diary has been reporting the repetitive increase of the temperature

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To avoid the risk of explosion, Tepco is to inject nitrogen gas to suppression chamber of reactor1 for a month

Tepco is going to inject nitrogen gas to suppression chamber of reactor1. Fukushima TV reported, reactor1 has been having density of hydrogen gas and Krypton unstable since this April. Tepco

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Sharply increasing hydrogen concentration in reactor2

Related to this article..Violent fluctuations of hydrogen concentration in reactor1 In reactor2, hydrogen concentration is picking up since 6/14/2012 as well. Until 6/17/2012 11:00, it’s increased almost as double as

Plant hazard

Violent fluctuations of hydrogen concentration in reactor1

Hydrogen concentration of reactor 1 has been fluctuating violently since 6/3/2012. On the daily press conference of 6/4/2012, Tepco explained hydrogen gas is heterogeneous inside of PCV, the indicator captured the

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Nitrogen injection stopped again

Tepco sent another emergency email to the journalists at 04:18:37JST 4/13/2012. 件名: 【東京電力からのご連絡】福島第一原子力発電所窒素封入装置の停止と復旧について 差出人: @tepco.co.jp 日時: 2012年04月13日 04:18:37JST 宛先: @tepco.co.jp ──────────────────────────────────── 東京電力からのご連絡 ──────────────────────────────────── 報道関係各位 ・本メールは、事前に「深夜・早朝における連絡先」の登録のお申し込みをいただ いた方にお知らせしています。 ・本日(4月13日)午前1時に、当社社員がプラントデータを確認していたところ 福島第一1~3号機の窒素ガス封入量が低下していることを確認しました。 ・このため、午前1時30分頃、現場を確認したところ、午前1時4分に「圧縮機故 障」警報により、窒素供給装置(窒素ガス分離装置B)が停止していることを確 認しました。