Tag "nitrogen"

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Coolant water injection system of reactor1 has a trouble / Reactor1 might lose the coolant system suddenly

Note : Thank you for reading Fukushima Diary. Fukushima Diary is genuinely supported by your donationMonthly recurring donation is also appreciated.     One of the two coolant water injection

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Tepco decreased Nitrogen gas injection to reactor1 → (26 hours later) reactor temperature rose up by 8℃

For some reason, reactor1 gets heated up once Tepco stops nitrogen gas injection. In order to purge hydrogen gas that may cause hydrogen gas explosion, Tepco is injecting nitrogen gas

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11 m3 of nitrogen gas discharged from reactor1 and 2 every hour

“Steam” is repeatedly observed coming up from the top of reactor3. This July Tepco suggested it may be the Nitrogen gas injected to reactor3. (cf, [Steaming reactor3] Tepco “The steam

Core removing struggle Plant hazard

今日のおもしろにぅす ー1号機はなかば窒素注入による空冷式で温度が保たれてる状態にあることが分かってしまった

This is not so new for English readers. It’s to help Japanese readers understand the situation well.     http://fukushima-diary.com/2012/04/reactor-1-goes-over-100%E2%84%83-within-8-hours-without-nitrogen-injection/ http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/m121203_03-j.pdf http://www.tepco.co.jp/nu/fukushima-np/handouts/2013/images/handouts_130617_02-j.pdf http://www.tepco.co.jp/nu/fukushima-np/handouts/2013/images/handouts_130628_03-j.pdf     Iori Mochizuki   “I’ll be

Core removing struggle Plant hazard

Tepco to finally investigate why reactor1 temperature goes up when they stop nitrogen gas injection

Tepco is finally going to investigate the connection between the nitrogen gas injection and the PCV temperature of reactor1. Since April of 2012, Fukushima Diary has been reporting that the

Core removing struggle Plant hazard

Reactor1 temperature rised after nitrogen gas injection

Since 5/14/2013, Fukushima Diary has been reporting the unusual increase of temperature in reactor1. (cf, Reactor1 reaching 49℃, increased by 3℃ within 24 hours [URL]) On 5/17/2013, Tepco reported the

Core removing struggle

Tepco to restart nitrogen gas injection into reactor1

According to Tepco, they are going to restart the nitrogen gas injection into the suppression chamber of reactor1 on 5/8/2013. 6~7m3/h will be injected in order to “push out the

Core removing struggle

The purpose of nitrogen injection to reactor1 is “to confirm the impact of the radiolysis of water inside the PCV”

On 2/25/2013, Fukushima Diary reported Tepco was going to restart the nitrogen gas injection into PCV of reactor1. [URL 1] On 2/26/2013, Tepco reported the purpose is to confirm the

Core removing struggle

Tepco to restart nitrogen gas injection into reactor1 again

From 2/26/2013, Tepco is going to restart injecting nitrogen gas into S/C of reactor1. (5m3/h) S/C is a part of PCV. If the hydrogen gas density goes over 2%, there

Core removing struggle

The flow rate of nitrogen gas injection to reactor3 RPV has been increasing since this August

According to Tepco’s plant parameter, the flow rate of nitrogen gas injection to RPV in reactor3 has been increasing since this August. They keep injecting nitrogen gas into the reactors