主题：【讨论】日本核灾难最新更新 -- 井底望天

1.*Confidential U.S. document* exposes “NEW” threats at Fukushima: “Likely no water” in No. 1 reactor core… Risk of explosions inside containment structures” — “Could persist indefinitely”April 6th, 2011 at 03:16 AM

U.S. Sees Array of New Threats at Japan’s Nuclear Plant, New York Times by James Glanz and William J. Broad, April 5, 2011:

United States government engineers sent to help with the crisis in Japan are warning that the troubled nuclear plant there is facing a wide array of fresh threats that could persist indefinitely, and that in some cases are expected to increase as a result of the very measures being taken to keep the plant stable, according to a confidential assessment [dated March 26] prepared by the Nuclear Regulatory Commission. …

The Times’ article spotlighted several items of extreme importance:

“Semimolten” fuel rods and salt are “impeding the flow of fresh water meant to cool the nuclear cores” in ALL THREE REACTORS

The water flow in reactor No. 1 “is severely restricted and likely blocked“

Similar problems exist in No. 2 and No. 3, although the blockage is probably less severe

“There is likely no water level” inside the core of reactor No. 1

There is a possibility of “explosions inside the containment structures”

2. Vancouver seaweed almost 400% above international limit for iodine-131 in food… by March 28 — Levels increasingApril 5th, 2011 at 09:34 PM

Amount of radiation in Vancouver rainwater decreasing – scientist, Vancouver Sun, April 5, 2011 at 7:17 pm EDT:

… Meanwhile, seaweed samples were still showing increasing iodine-131 as of March 28, according to data provided by [Krzystof Starosta, a nuclear chemist and physicist and associate professor at Simon Fraser University].

In samples of dehydrated seaweed taken on March 15 near the North Vancouver SeaBus terminal, the count was zero; on March 22 it was 310 Bq per kilogram; and by March 28 it was 380 Bq/kg. …

Read the report here.(http://www.vancouversun.com/news/Amount+radiation+Vancouver+rainwater+decreasing+scientist/4562265/story.html#ixzz1IgoN8H1b)

Fruits and vegetable import from Shizuoka suspended, AsiaOne, April 01, 2011:

The Agri-Food & Veterinary Authority of Singapore (AVA) will extend its suspension of import of fruits and vegetables from Shizuoka with immediate effect.

This is after radioactive contaminants were detected in a sample of Komatsuna (Japanese Mustard Spinach) imported from the Shizuoka prefecture. Tests on the shipment yesterday showed that it had 648bq/kg of Iodine-131, … The Codex guidelines for radionuclides in food (other than infant food) for Iodine 131 is 100 bq/kg…

Food Contaminants, Hong Kong Centre for Food Safety, April 1, 2011:

What are the criteria adopted at present in testing the level of radioactive contamination in Japanese food products, and the measures to be adopted when some food products are found to have a level of radioactive contamination exceeding the normal standard?

CFS currently adopts the standards laid down by the Codex Alimentarius Commission, which are international standards, in the Guidelines Levels for Radionuclides in Food following Accidental Nuclear Contamination in testing the radiation levels of food. Relevant radionuclides include iodine-131 (100 Bq/kg), caesium-134 and caesium-137 (1,000 Bq/kg), etc, which are most closely associated with health risks.

If a consignment of food is tested to have exceeded the contamination standard, the Food and Environmental Hygiene Department will immediately detain that consignment and arrange for disposal.

(www.enenews.com)