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Saturday, 4 January 2014

Status and condition of Unit #-#3 as of Dec 25th of 2013 via Tepco


Via Masaichi Shiozaki, translated by D'un Renard
Fukushima Daiichi Nuclear Power Plant Unit 3, the situation at the end of the year (TEPCO data)
Data of December 25, (2013 (parameters). Graph the temperature of the atmosphere "D / W", "around the vessel pressure furnace atomic" of 9 / 21-12 / 25)
As far as these parameters, there is no significant abnormality in the Unit 3 December 25.
‣ reactor feed water system water injection situation: 1.9 m⊃3; / h CS system: 3.5 m⊃3; / h
‣ reactor pressure vessel bottom temperature
RPV lower head temperature (TE-2-3-69L1): 27.3 ℃
Skirt junction upper temperature (TE-2-3-69F1): 27.0 ℃
RPV bottom head upper temperature (TE-2-3-69H1): 24.0 ℃
‣ reactor containment vessel temperature
Return containment air conditioner air temperature (TE-16-114A): 25.8 ℃
Containment air conditioner supply air temperature (TE-16-114F # 1): 24.2 ℃
‣ reactor containment vessel pressure 0.22kPag
‣ (a value obtained by flow rate correction at the temperature and pressure of use * state) nitrogen injection flow rate
RPV: 16.70N m⊃3; / h
PCV:-N m⊃3; / h (* nitrogen injection is stopped)
‣ reactor containment hydrogen concentration
A system: 0.11vol%
B system: 0.10vol%
‣ reactor containment radioactivity concentration (Xe135)
A system: ND (3.2E-01Bq / c cubic meters or less)
B system: ND (3.2E-01Bq / c cubic meters or less)
‣ 10.5 ℃ spent fuel pool water temperature
For (* Unit 3 spent fuel pool alternative cooling system stopped, The description of the data with respect to close the gap FPC surge tank water level and Unit 3 spent fuel pool water temperature.
The temperature increase rate of the spent fuel pool and evaluation 0.125 ℃ / h or so)
‣ FPC skimmer surge tank water level 3.58m

Japanese text :
福島第一原発3号機、年末の状況(東電資料)
(2013年12月25日のデータ(パラメータ)。グラフは9/21~12/25の”原子炉圧力容器まわり”、”D/W雰囲気”の温度)

これらのパラメータを見る限り、12月25日現在 3号機に大きな異常はない。

‣原子炉注水状況 給水系:1.9㎥/h CS系:3.5㎥/h
‣原子炉圧力容器底部温度
RPV下部ヘッド温度(TE-2-3-69L1):27.3℃
スカートジャンクション上部温度(TE-2-3-69F1):27.0℃
RPV底部ヘッド上部温度(TE-2-3-69H1):24.0℃
‣原子炉格納容器内温度
格納容器空調機戻り空気温度(TE-16-114A):25.8℃
格納容器空調機供給空気温度(TE-16-114F#1):24.2℃
‣原子炉格納容器圧力 0.22kPag
‣窒素封入流量 (*使用状態の温度・圧力で流量補正した値)
RPV:16.70N㎥/h
PCV:-N㎥/h (*窒素封入停止中)
‣原子炉格納容器水素濃度
A系:0.11vol%
B系:0.10vol%
‣原子炉格納容器放射能濃度(Xe135)
A系:ND(3.2E-01Bq/c㎥以下)
B系:ND(3.2E-01Bq/c㎥以下)
‣使用済燃料プール水温度 10.5℃
(*3号機使用済燃料プール代替冷却システム停止中の為、3号機使用済燃料プール水温度とFPCスキマサージタンク水位に関しては至近のデータを記載。なお、使用済燃料プールの温度上昇率は0.125℃/h程度と評価)
‣FPC スキマサージタンク水位 3.58m

Source: http://www.tepco.co.jp/nu/fukushima-np/roadmap/images/d131226_05-j.pdf
D'un Renard's insight:

"....As far as these parameters, there is no significant abnormality in the Unit 3 December 25...."
"....The temperature increase rate of the spent fuel pool and evaluation 0.125 ℃ / h or so)...."
"....‣ FPC skimmer surge tank water level 3.58m...."
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