Source: https://www.scribd.com/document/85365737/Fukushima-Daiichi-Status-Update-April-06-2120-Pages-from-ML12037A103-FOIA-PA-2011-0118-FOIA-PA-2011-0119-amp-FOIA-PA-2011-0120-Resp-41
Timestamp: 2017-04-30 11:08:35
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ScribdBrowseInterestsCareer & MoneyPersonal GrowthPolitics & Current AffairsScience & TechHealth & FitnessLifestyleEntertainmentBiographies & HistoryFictionBrowse byBooksAudiobooksNews & MagazinesSheet MusicBrowse allUploadSign inJoinFukushima Daiichi Status Update – April 06 - 2120 - Pages from ML12037A103 - FOIA PA-2011-0118, FOIA PA-2011-0119 &amp; FOIA PA 2011-0120 - Resp 41 - Partial - Group DDD Part 1 of 3. (78 page(s), 1 24 2012)-40Uploaded by EnformableFukushima Daiichi Nuclear Power PlantNuclear TechnologyNuclear EnergyEnergy TechnologyNuclear Power0.0 (0)DownloadEmbedView MoreCopyright: Attribution Non-Commercial (BY-NC)Download as PDF, TXT or read online from ScribdFlag for inappropriate content4-0Unit No.
Fukushima Daiichi Status Summary - 2120 EDT 04/612011 Update
400 assemblies - damaged; RPV pres: (ch A=52.6 psig, ch B=109.9 psig) t (TEPCo 4/7); RPV level: -1/2 TAF (TEPCo 4/7); fresh water inject. 26.4 gpm*-+ (TEPCo 4/7) via feedwater line using temp. elect. pump (IAEA 4/5); RPV temp: Btm Head 116.2°Ct1, FW nozzle: 216.3°Ct1 (TEPCo 4/7), On offsite AC power - CR Lighting for U-i, 2, 3 & 4 (JAIF 4/1); instr pwr on for U-I, 2 & 4 (IAEA 3/29); Primary: damage suspected, slow leakage, began injecting nitrogen gas at 1:30 AM JPT on 4/7 (NHK World News). D/w pressure: 7.8 psigi' (TEPCo 4/7) & 3080 rem/hr<-4(TEPCo 4/7). Losing 10-30% drywell volume/day (Site Team 4/2) Torus press. 7.8 psigt (TEPCo 4/7) & 1290 rem/hrt' (NISA 4/6). Stuck open SRV (Site Team, confirmed by TEPCo). Secondary: severe damage from H, explosion. 292 bundles (GEH); Temp: indicator failure (4/4 NISA) 180 CT (uncertain, overhead thermography) (JAIF 4/4), LVL: unconfirmed, Periodic spray using pumper (DOE 4/3), 548 assemblies - damaged; RPV pres: (ch A= -2.6 psig, ch B= -3.6 psig)<-E(TEPCo 4/7); RPV level: 315 TAF (TEPCo 4/7); freshwater injection 35.2 gpm+-+ (TEPCo 4/7) via fire ext. line using temp. elect pump (IAEA 4/5) RPV temp: Btm Head (not avail) (TEPCo), FW nozzle 144.2 0 CT (TEPCo 4/7), On offsite AC power (NISA 4/3) Primary: damage suspected. D/w pressure: -0.2 psig<-- (TEPCo 4/7) & 3060 rem/hr"-- (TEPCo 4/7) Torus: 81 rem/hr*-* (TEPCo 4/7) Secondary: panels removed from side of Rx bldg to reduce H2 build-up. Site team feels an SRV is also stuck open, but TEPCo opinion currently differs. May begin to inject nitrogen gas (NHK World News) 587 bundles (GEH); Temp: 48.0 0C,4,(TEPCo 4/7); Level: fresh water injection via SF cooling system line using temp. elect. pump continues (IAEA 4/5) 70 Tons of water added (Site Team 4/5) 548 assemblies - damaged; RPV pressure: (ch A= -. 3 psig, ch B= -11.4 psig),l,(TEPCo 4/7); RPV level: - 2/5 TAF (TEPCo 4/7); freshwater injection 30.8 gpm*-, (TEPCo 4/7) via fire ext. line using temp. elect pump (IAEA 4/5) RPV temp: Btm Head 115.80C+--; FW nozzle: 83.4.C1I (TEPCo 4/7) On offsite AC power (NISA 4/3). Primary: RST suspects failure. D/w pressure: 0.9 psig4-> (TEPCo 4/7) & 1960 rem/hr (TEPCo 4/7), Torus press. 10.4 psig<-) (TEPCo 4/7) & 77.7 rem/hr,-* (TEPCo 4/7) Secondary: severe damage from H2 explosion. May begin to inject nitrogen gas (NHK World News) 514 bundles (GEH) - damage suspected (JAIF 3/28); Temp: indicator failure (4/4 NISA) 570 CT (uncertain, overhead thermography) (JAIF 4/4); Level: fresh water injection via SF cooling system line & periodic spraying (IAEA 4/5) spray initiated via concrete pumping vehicle 0400EDT4/4 (TEPCo 4/4), 70 tons of water added (Site Team 4/5) 1331 bundles in SFP (GEH & NISA) Temp & Level: indicator failure (4/4 NISA) 300 C4 (uncertain, overhead thermography) (JAIF 4/4); On offsite AC power (DOE 4/3),150 tons of water added (Site Team 4/5) Level trending down (Site Team, 4/6) 548 assemblies - no damage; RPV: pressure .7 psig; temp 34.80 C,4 (TEPCo 4/7); Cold shutdown at 1430 JDT 3/20 (NISA); Offsite AC power supplying house loads (IAEA 3/28) injection via normal make-up water (IAEA 3/31); 946 bundles (JAIF); Temp: 34.8 0C4-,(TEPCo 4/7); Cooling capability recovered (JAIF 4/1) 764 assemblies - no damage; RPV: pressure .7 psig; Temp: 48.10 CT (TEPCo 4/7); Cooling using RHR; Cold shutdown at 1927 JDT 3/20 (NISA); offsite AC power to house loads (IAEA 3/28); injection via normal make-up water (IAEA 3/31); SF Pool 876 bundles (GEH); Temp: 21.5 0C1, (TEPCo 4/7); Cooling capability recovered (JAIF 4/1)
0 6,000 bundles (GEH) maintained at 29.O CT (TEPCo 4/6); normal cooling started 1805 JDT 3/24/2011 (NISA)
SF Pool 6*
Radioactive groundwater leakage into (est. 1500 tons) to and U6 turbine buildings could flood buildings & damage "vital" equipment, started pumping this water sub-drain pits of U5the sea at 2100 JDT on 4/4 (TEPCo 4/5)
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, temperature is 36 C vs. 21 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.
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