There have been no reports about inadequate food in any Japanese sources, only American and UK reports. Working conditions are difficult and it is impossible to provide a midday meal. Dinner cossists of rice with canned chicken, fish or curry. The type of high calorie "crackers" for breakfast has not been reported, they are accompanied by a carton of vegetable juice.
A Japanese nuclear official said conditions were grueling, with no facilities in the plant. It sound much like field conditions for military units under fire.

A shortage of dosimeters was reported, saying that for a time only the crew leaders had them. This lack was corrected when a shipment was received.

From the reports, it is impossible to accurately assess the exposure received by the workers; some shifts are as short as 10 minutes, but even this could be unsafe. The conditions at Chernoble come to mind, and Charley perhaps could fill us in on exposures at Three Mile Island.