8/2/2019 Fukushima Daiichi Status Update – April 03 - 2100 - Pages from ML12037A103 - FOIA PA-2011-0118, FOIA PA-2011-0119 & FOIA PA 2011-0120 - Resp 41 - Partial - Group DDD Part 1 of 3. (78 page(s), 1 24 2012)-32

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Unit Fukushima Dalichi Status Summary - 2100 EDT 0413/2011 - Update Priority

No.

400 assemblies-damaged; RPV pres: (ch A=44.1 tpsig, ch B=85.8tpsig) (TEPCo 4/4); RPV level: -1/2 TA F (NISA 4/3);fresh water inject. 26.4 gpm., (TEPCo 4/4) via fire ext. line using temp. elect. pump (IAEA 4/2); Vessel temp: Btm Head

Core 13.4oC-+, FW nozzle: 243.1 °C4, (TEPCo 4/4), On offsite AC power - CR Lighting for U-i, 2, 3 &4 (JAIF 4/1); instr pw r on

for U-1, 2 &4 (IAEA 3/29);

Primary : damage suspected, slow leakage. D/w pressure: 7.84,psig (TEPCo 4/4) D/w 3830 rem/hr (TEPCo 4/4). Losing

Containment 10-30% drywell volume/day (Site Team 4/2) Torus press. 7.8 psig (TEPCo 4/4) Torus: 1340 rem/hr4,. (TEPCo 4/4).Secondary: severe damage from H, explosion.

SF Pool 292 bundles (GEH); Temp: 100C (3/31 0815JST USFJ), LVL: unconfirmed, Periodic spray using pumper (DOE 4/3)

548 assemblies - damaged; RPV pres: -1.8..-psig (TEPCo 4/4); RPV level: 2/3 TA F (IAEA 4/3); freshwater injection 35.2

Core gpm+-* (NISA 4/3) via fire ext. line using temp. elect pump (IAEA 4/2) Vessel temp: Btm Head 137 0Ct (Site Team 3/31),

FW nozzle 140.30C,, (TEPCo 4/4), On offsite AC power (NISA 4/3)

2 Containment Primary: damage suspected. D/ w pressure .5 +-+psig (TEPCo 4/4) 3340 rem/hrJ, (TEPCo 4/4) Torus: 91 rem/hr, 2

(TEPCo 4/4) Secondary: panels removed from side of Rx bldg reducing H2 build-up.

SF Pool 587 bundles (GEH); Temp: 48.00 Cl, (TEPCo 4/4); Level: full, fresh water injection continues (DOE 4/3)

548 assemblies - fuel damaged; RP V pressure: 1.04, psig (TEPCo 4/4); RP V level: - 2/5 TA F (IAEA 4/3) Rad levels

Core indicate fuel covered (site team); freshwater injection 30.8 gpm,. (TEPCo 4/4) via fire ext. line using temp. elect pump

(IAEA 4/2) Vessel temp: Btm Head 114.10C't ; FW nozzle: 89.80Ct' (TEPCo 4/4). On offsite AC power (NISA 4/3).

3 Containment Primary: RST suspects failure. D/ w pressure: 0.9t' psig, Torus press. 10.7 psig (TEPCo 4/4). 2150 rem/hrl,, Torus: 87 3

rem/hr4,ý (TEPCo 4/4) Secondary: severe damage from H2 explosion.

514 bundles (GEH) - damage suspected (JAIF 3/28); Temp: unconfirmed-estimate is 450C (USFJ3/31) ; Level: fresh

water spray periodically (DOE 4/3).

4 SF Pool 1331 bundles in SFP (GEH & NISA) Temp & Level: Periodic water sprays (DOE 4/3). On offsite AC power (DOE 4/3). 4

Secondary contain, severe damage-H2 explosion

Core 548 assemblies - no damage; RPV intact; temp 29.90C4, (TEPCo 4/4); Cold shutdown at 1430 JDT 3/20 (NISA); Offsite AC

5 power supplying house loads (IAEA 3/28) injection via normal make-up water (IAEA 3/31); 5SF Pool 946 bundles (JAIF); Temp: 36.1

0Ct (TEPCo 4/4); Cooling capability recovered (JAIF 4/1)

764 assemblies - no damage; RP V intact; Temp 48.00Ct' (TEPCo 4/4); Cooling using RHR; Cold shutdown at 1927 JDTC 3/20 (NISA); offsite AC power to house loads (IAEA 3/28); injection via normal make-up water (IAEA 3/31); 6

SF Pool 876 bundles (GEH); Temp: 21.5 0CJ, (TEPCo 4/4); Cooling capability recovered (JAIF 4/1)

Common SF Pool 6,000 bundles (GEH) maintained at 32.0 0Cl, (TEPCo 4/4); normal cooling started 1805 JDT 3/24/2011 (NISA) 7

Notes

8/2/2019 Fukushima Daiichi Status Update – April 03 - 2100 - Pages from ML12037A103 - FOIA PA-2011-0118, FOIA PA-2011-0119 & FOIA PA 2011-0120 - Resp 41 - Partial - Group DDD Part 1 of 3. (78 page(s), 1 24 2012)-32

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Summary Sheet Notes:Basis for Assigned Priority to Units

PRIORITY 1 - Unit 1, maintaining containment is high priority

PRIORITY 2 - Unit 2, containment damaged

PRIORITY 3 - Unit 3, Primary containment may be intact. However,flooding in turbine building contains 1-131

PRIORITY 4 - Unit 4, due to the condition of its spent fuel pool

PRIORITY 5 - Unit 5, Higher priority, temperature is 37 C (increased

slightly) vs. 22 C in Unit 6. Difference not significant. Cooling

being maintained.

PRIORITY 6 - Unit 6, SPF cooling being maintained

Common SFP is low priority, adequately maintained.