ML19249D295
| ML19249D295 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/05/1979 |
| From: | Hendrie J NRC COMMISSION (OCM) |
| To: | Rangel C CONGRESS (JOINT & ROTATING COMMITTEES, ETC.) |
| Shared Package | |
| ML19249D296 | List: |
| References | |
| NUDOCS 7909240021 | |
| Download: ML19249D295 (2) | |
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The' Honorable Charles B. Rangel
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Dear Congressman-Rangel:
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.I. regret thas T was' unable to answer your meilgram of April 2,1979, directly during or imediately-after th'e accident at the Three Mile -
'Is' land nuclear' power plant.. However. during this period, NRC repre -
sentatives from the Office of State Programs, operating ont of the Emergency Optrations Center in Bethesda, were in close contact with the New York State Health Department Bureau of. Radiological Health.. It..was their responsibility tar supply all pertinent information related to this accident to officials of the Bureau of Rad 0 logical Health of the. State of New York.
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For your information, we are providing the following data on radiation
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levels measured at various distances prior to the Mar:W 28 : accident as well as subsequent to-it'and..the-potential health hazard posed by those i_..,
1evels.
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. Prior to the March'28 a'ccident the noma 1 background: level in all.
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l 3directionsfromthe~siterangedfromapproximately 0.01-0.02 millircentgens/
-hour.. In the time frame imediately following the accident, the measured l
radiation levels were'substantially higher with'the highest readings g
being measured near the site. boundary.
p At.the.. time of the accident, Metropolitan Edison had @ thermoluminescent dosimeters (TLDs) deployed at various distances from the site (out -to
'approximately 15 miles). These TLDs measure the integrated dose over a 4
period of time. The TLDs were collected and replaced with new TLDs
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_approximately 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> after the accident. 4 W sis of the TLDs indicated
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that the average dose rate in the environs W mea.sured by the TLDs) during the thirty hours imediately after( D~ inc?Jent was generally in
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l the range 0.10.2~milliroentgens/ ha, e :.sckground. Two locations on uninhabited islands near the site %mt4.4.';J a significantly higher 6
dose rate. The two islands and' dose. wre Shei!sy Island (1.1 miles SSW l
i of site),1.3 milliroentgens/ hour and Kohn Island'(&4 roles NNW of site), 25 milliroentgens/ hour. During the period March 29-31,. analysis of the.msults from the same-TLD locations indicated that the dose rate
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was generally in~the' range of 0.02-0.2 milliroentgen / hour. The highest, t.
reading was 0.8' milliroentgen / hour.1/2 mile ENE of the site.-
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The Honorable Charles B. Rangel.
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k: < +' Analysis of the 37 TLDs deployed by the 15tc out to 12 miles from the t '.
I site iMicated that most of'the average dose. rates on March 31-Apr11. T YW/ W rangert from 0.01-0.05 milliroentgens/ hour with the highest average dese S.MM I-rate of 1.4 milliroentgens/ hour approximately 1/2 mile ENE of the sitw...,Mit; .'. : G
' During the next week the average dose rates were on-a generally downuant. ' r.l:% 109 i.
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f.. trend sad lay April 8, they mere at nonnel background. levels..
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- Based on the foregoing' radiation measurements, no significant healt(~ ^,
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. hazard 1s expected to rend k : w.m. R:..,.
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4 Predicticas of. radiation dispersion patterns are not expected to be'w
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influenced by explosion or meltdown (quantitias of materials relosed
' would t's affected). The attached document " Population Dose and Health
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s Impact of the Accident at the Three Mile Island Nuclear Station", HUREG-M 0558. gives detailed information on dispersal of radioactive materials
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i and radiation doses to its population around the TMI site.
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I hope the above infonmation will be helpfk1 to you. If you need
.h further information, please let me know.
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FROM:
ACTION CONTROL DATES CONTROL NO P49. Charl'es G. Rafvjel/ Tad Wetss COMPL DEAOLINE 9 f ar7 f 7. *
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oATE OF oOCuueNT
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INTERIM REPLY ggy TO:
PREPARE FOR SIGNATURE OF:
1 FINAL REPLY ff //
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CHAIRMAN FILE LOCATION EXECUTIVE OlRECTOR 7/
- OTsER, DESCRIPTION O LETTER O MEMO O REPORT O OTHER SPECIAL INSTRUCTIONS'OR REMARKS Req info on radiation dispersica patterns expected from TM1 and the rist.s to tiew tfA will coordiruta TMI key currespondenca York City-and will ba in contact w/ offices involved to acquire input.
A&fres,ss ASAP - 10 days, or talk w/ Rana CLASSIFIED DATA DOCUMENT / COPY NO.
CLASSIP f CATION g',
NUMBER OF PAGES CATEGORY g
POSTAL REGISTRY NO.
O NSI O RO O FRD WCT 79 0638 O
ASSIGNED TO:
DATE INFORMATION ROUTING LEG AL REVIEW 0 FINAL 0 COPY AS$1GNED TO:
DATE.'
NO LEGAL OBJECTIONS m 3 9.,-
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exECuTivaflRECTOR FOROPERATIONS DO NOTREMOVE THIS COPY "
PRINCIPAL CORRESPONDENCE CONTROL O
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5, 79-0888 4/3/79 to,,,no o.t.
e NRC SECRETARIAT To: O commi.ioner o.t.
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O cen.couniei S
O Cons.ti.ison O soiicitor I
O Public Aff irs O secretary e
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Reps. Charles Ranael & Ted Weiss &
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officials 4/2/79 Chainnan Hendrie o,te To: Reauests info. on radiation disoersal e
,s suweet:
3 WMYMM nattpensN ovnpr tod fenn Throp Milo Teland k
O X@ Prepare reply for sign.ture of:
XXD, en-m.n,] ~ Date due Com: April 13 e
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~, "*ACRSr 01A. Incident Resoonse Center. -0CA to Acknowledge Rapifaxed lo EDO g
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l For the Commissm:3.Ns
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