March 19th, 2011 – International discussion related to accuracy of TEPCO readings – Where is water going?

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From: Casto, Chuck
Sent: Saturday, March 19, 2011 1:55 PM
To: LIA02 Hoc; RST01 Hoc; Liaison Japan
Cc: LIA03 Hoc
Subject: Re: Question from UK

TEPCO is concerned and asked us for advice.

From: LIA02 Hoc
To: RSTO1 Hoc; Liaison Japan
Cc: LIA03 Hoc
Sent: Sat Mar 19 13:52:22 2011
Subject: RE: Question from UK

What about the concern with crystallization?


From: RST01 Hoc
Sent: Saturday, March 19, 2011 1:51 PM
To: LIA02 Hoc; Liaison Japan
Cc: LIA03 Hoc
Subject: RE: Question from UK

Based on a US built BWR:

Continuing to inject into RPV for this many days means:
– they are not injecting at the flow rate they are claiming
– the level readings they report are inaccurate
– if they were injecting at the rate they are reporting they should have filled the RPV up to the steam lines and out any SRVs that have pneumatics and dc control power, the RPV pressure would be the shutoff head of the pumping system (at the SRVs), therefore the RPV pressures they report are inaccurate.

Based on US built BWRs


From: LIA02 Hoc
Sent: Saturday, March 19, 2011 1:07 PM
To: RSTO1 Hoc; Liaison Japan
Cc: IA03 Hoc
Subject: Question from UK

I received a call from the UK as a followup to the 9:30 call with them. They are asking about crystallization on the fuel. With the decay heat they anticipate that there will be crystallization on the surface area within a day of them starting to inject seawater, and significant clogging within 3 days. They want to know our thoughts.

They also asked about where the water is going. If they continue to add water and the water is going out the relief valve into containment, then the pressure would increase, which has not been seen.

They would like to discuss today at the 2 pm call with the health physics folks.

Steve Bloom


UK Questions Related to Fukushima Daiichi – Pages From C141864-02A

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