ML20205Q371
| ML20205Q371 | |
| Person / Time | |
|---|---|
| Issue date: | 05/05/1986 |
| From: | Speis T NRC |
| To: | NRC |
| Shared Package | |
| ML20205N459 | List: |
| References | |
| FOIA-86-335 NUDOCS 8704030505 | |
| Download: ML20205Q371 (2) | |
Text
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'/ #g UNITED STATES f g NUCLEAR REGULATORY COMMISSION 3 j WASHINGTON, D. C. 20555
' *\ ,f MAY 0 51986 MEMORANDUM FOR: Distribution FROM: Themis Speis, Director Chernobyl Incident Tracking Team
SUBJECT:
CHERNOBYL INCIDENT TRACKING TEAM DAILY STATUS REPORT - MAY 5, 1986 9 Enclosed is the daily status report of May 5,1986 for the NRC's Incident Tracking Team.
/A 4 Themis Speis, Director Chernobyl Incident Tracking Team
Enclosure:
As stated 8704030505 870330 {pth-$(e-337 PDR FOIA TAYLOR 86-335 PDR
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.- INCIDENT TRACKING TEAM - DAILY STATUS REPORT - MAY 5, 1986
.. Items of Interest -
Japanese reported rainwater activity of 10,000 picocuries/ liter with a
' maximum of 13,000 picocuries/ liter. FDA action guidelines are that ,
ingestion pathways should be interrupted when activity in milk reaches l 15,000 picocuries per liter.
' Calculations which examined preliminary data on the ratios of. Iodine 131 to Iodine 133 indicate that the Chernobyl reactor was shut down on. Friday, April 25.
- Refined calculations by Pacific Northwest Laboratories (PNL) of station blackout indicate that if Unit 3 lost all ac power or feedwater after nine days.of being shut down, boiloff and heatup to the point of co~re damage would take approximately two to four days, given the uncertainties in design data.
Data from Norway. received this morning shows air concentrations of radio-- - activity over Oslo decreasing from initial values on 4/28/86 until about noon, 5/4/86; then suddenly increasing. While the reason is unclear,~it could be the effect of a returning plume. l Radioactivity is now off of coast of Northwest U.S. NRC is requesting all utilities wi.th nuclear reactors on West Coast to assist NRC by measuring radioactivity in rainwater samples and reporting results to NRC's Operations Center. \.
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EPA's sampling network emphasizes air, milk and water. In order to supplement this existing network, NRC would be especially interested in any information on precipitation samples which licensees may obtain and the prompt reporting of the results to the NRC Operations Center (202/951-0550) in accordance with IN 86-32 which was previously sent to each nuclear power reactor licensee. b l fp ( h - Sla-335 S4 :
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I , ,, -- j Recent information indicates that radioactive material from the Chernobyl reactor accident is now near the United States coast at about 30,000 feet. The most likely means of identifying any fallout from that material over the US will be through precipitation samples. EPA has requested that we ask NRC licensees to provide whatever data they may obtain on rain samples. EPA's sampling network emphasizes air, milk and water. In order to supplement this existing network, NRC would be especially interested in any information on precipitation samples which licensees may obtain and the prompt reporting of the results to the NRC Operations Center (202/951-0550) in accordance with IN 86-32 which was previously sent to each nuclear power reactor licensee. Foin 4 -33r Jh G.}}