(PLR Pump (A)) - 技術研究組合国際廃炉研究開発機構

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“Development of a technology to investigate inside the Reactor Primary Containment Vessel (PCV)” ‐ Site test “Investigation B1” on grating around the pedestal inside Unit 1 PCV ‐
[Prompt report for April 16, 2015]
April 17, 2015
Tokyo Electric Power Company
本資料の内容においては，技術研究組合国際廃炉研究開発機構（IRID）の成果を活用しております。
The content of this material includes the output of the International Research Institute for Nuclear Decommissioning (IRID)
All Rights Reserved. Copyright© 1995‐2015 TEPCO. 無断複製・転載禁止東京電力株式会社
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1. Investigation scope and results
 The following information have been obtained on the access points of C6 to C11.
CRDレール
HVH
Investigation scope
MS pipe
HVH
C11,
B14,
On access route
（C6～C11）
C10,
B13,
PLR pump
C9,
B12,
C8,
B11,
C7,
PLR配管
C6,
HVH
Investigation results
B10,
・No significant damages were found on the existing equipment (PLR pump, walls inside the PCV, etc.)
・Temperature and dose rates have been obtained at each investigation point.
B8,
C5,
HVH
C4,
B3,
C3,
C2,
C1,
B1,
B2,
B4,
B5,
B7,
B6,
: Route and points investigated on April 15, 2015
C0, B0,
: Route and points investigated on April 16, 2015
X100B penetration pipe
無断複製・転載禁止東京電力株式会社
1
2‐1. Images obtained (PLR Pump (A))
Taken from the point C7.
MS pipe
Pedestal Opening
C11,
Cables around PLR pump
C10,
PLR pump (A)
C9,
C8,
ＰＬＲ pump
C7,
PLR pipe
C6,
HVH （E）
C5,
HVH （Ｄ）
C4,
C3,
C2,
C1,
C0,
Supporter
Duct
X100B penetration pipe
All Rights Reserved. Copyright© 1995‐2015 TEPCO. 無断複製・転載禁止東京電力株式会社
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2‐2. Images obtained (PLR Pump (A))
Taken from the point C10
PLR pump w/ small diameter
MS pipe
Pedestal Opening
C11,
C10,
PLR pump (A)
C9,
C8,
C7,
PLR pump w/ small diameter
PLR pipe
C6,
HVH （E）
C5,
HVH (D)
C4,
C3,
C2,
C1,
C0,
X100B penetration pipe
All Rights Reserved. Copyright© 1995‐2015 TEPCO. 無断複製・転載禁止東京電力株式会社
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2‐3. Images obtained (walls inside the PCV)
Taken from C10
Wall inside PCV
MS pipe
C11,
Pedestal Opening
C10,
PLR pump (A)
C9,
C8,
C7,
PLR pipe
C6,
HVH （E）
C5,
HVH （Ｄ）
C4,
Feet of ladder
C3,
C2,
C1,
C0,
Wall inside PCV
X100B penetration pipe
All Rights Reserved. Copyright© 1995‐2015 TEPCO. 無断複製・転載禁止東京電力株式会社
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3. Investigation results on the clockwise route (Temperature/ Dose rate)
 Temperature and dose rate were measured at the following points.
Dose rate (Sv/h)
Temperature (℃)
Ｃ2
6.7
19.6
Ｃ5
8.3
19.5
Ｃ6
7.7
19.4
Ｃ9
4.7
20.8
Ｃ10
5.3
21.1
Ｃ11
6.2
20.7
CRD rail
HVH MS pipe
HVH Spot where the device stuck
C11,
B14,
C10,
PLR pump
C9,
PLR pump
C8,
B12,
C7,
B11,
Opening to access basement
C6,
HVH B13,
C5,
HVH C4,
B3,
B4,
C3,
C2,
C1,
B1,
B2,
C0, B0,
X100B penetration
pipe
PLR pipe
B10,
：Points investigated on April 16, 2015
B8,
B5,
B7,
B6,
： Route investigated on April 10, 2015
： Route investigated on April 15, 2015
：Route investigated on April 16, 2015
All Rights Reserved. Copyright© 1995‐2015 TEPCO. 無断複製・転載禁止東京電力株式会社
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