ML19220C860
| ML19220C860 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/10/1979 |
| From: | Lafleur J NRC OFFICE OF INTERNATIONAL PROGRAMS (OIP) |
| To: | Abraham P, Cunningham J, Jennekins J CANADA ATOMIC ENERGY CONTROL BOARD, INDIA, IRELAND |
| Shared Package | |
| ML19220C857 | List: |
| References | |
| NUDOCS 7905160004 | |
| Download: ML19220C860 (2) | |
Text
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TELEGRAPHIC MESSAGE a -a oe age ~cy merce.ca securav cuss ecArc~
U.S. NUCLEAR REGULATORY COMMISSION OFFICE IF INTERNATIONAL PROGRAMS PRIORITY WASHINGTON, D.C.
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FCR INFORMATION CALL
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27788 J. D.1/AFLEUR, JR., DEPUTY DIRECTOR,IP D en"8+=55 THIS SP. CE FOR CSE GF CON.MUhlCA TION UNIT MESSAGE TO BE TRAN5MITTED / Un 4. 61, e mg,=4 11 c.sp ul 1,nml TO: NUCLEAR ENERGY SOARD J.H.F. JENNEKINS, PRESIDENT ATTN: JOHN CUNNINGHAM AECB 20-22 LOWER HATCH STREET OTTAWA, CANADA DUBLIN, IRELAND TLX: 053-3771 TLX: 306-10 DR. CLYDE MCCLELLAND l
P. ABRAHAM U.S. EMBASSY i
DAE SAFETY REVIEW COMMITTEE OTTAWA, CANADA BHASHA ATOMIC RESEARCH CENTRE TLX: 0533582 i
TROMBAY, BOMBAY, INDIA i
JU SUNG i
ROY SIMPKINS CCNA i
U.S. EMBASSY I
4301 CONNECTICUT AVE., N.W.
BELGRADE, YUG0SLAVIA SUITE 132 TLX: 11529 WASHINGTON, D.C. 20008 i
SUBJECT:
THREE MILE ISLAND REACTOR STATUS i
i THE FOLLOWING PRELIMINARY INFORMATION IS PROVIDED ON THE THREE MILE i
ISLAND NUCLEAR POWER PLANT INCIDENT OF MARCH 28, 1979, FOR USE AT YOUR DISCRETION. PLEASE NOTE THIS INFORMATION IS PRELIMINARY AND NOT FULLY EVALUATED.
i, TERMINATION OF RECOMMENDED LIMITED EVACUATION i
GOVERNOR THORNBURGH OF PENNSYLVANIA ON APRIL 9 UITHDREU i
HIS MARCH 30 RECOMMENDATION THAT PREGNANT UOMEN AND PRE-l SCHOOL CHILDREN EVACUATE THE AREA'0F FIVE-MILE RADIUS i
ARCUND THE THREE MILE ISLAND NUCLEAR POUER PLANT.
DLANT STATUS AS OF 6 A.M.
APRIL 10 A.
SULK COOLANT INLET AND OUTLET TEMPERATURES REMAIN AT
' E ^ _l - 250 DEGREES F.
THE AVERAGE CORE THERMOCOUPLE
'2
TURE IS ABOUT E95 DEGREES F, AND THE HIGHEST THERMO-
- .'UFLI READING IS ABOUT 400 DEGREES F.
g E.
A Eu-HOUR PERIOD OF ADDITIONAL DEGASIFICATION BY
=.EDUCINS PRIMARY PRESSURE TO 400 PSIG IN SMALL DECREMENTS 1
2 UNCLASSIFIED
$1APeO413 7CRM 14 e s-soo imso wovst i,.i u.s. GOVERMENT 99lNTING CFFICE: 1974-535-402
'N csA re-a i i cm ici-35.sc.
79051 00 0 a'
a UNCLASSIFIED l2 UAS COMPLETED ON APRIL 9.
N0 SIGNIFICANT CHANGE IN REACTOR COOLANT PUMP VISRATION OCCURRED DURING THIS PERIOD.
NOISE MEASUREMENTS DID INDICATE SOME GAS IN THE COOLANT AT LOUER PRESSURES, UITH RETURN INTO SOLUTION OVER TIME.
THE LICENSEE PL AT.'S TO REPEAT THE DEGASSING OPERATION, CYCLING DOUN TO APPROXIMATELY 300 PSIG, AND SUSSEQUENTLY TO HOLD REACTOR COOLANT SYSTEM DRESSURE AT ACPROXIMATELY 1000 PSIG.
A PHASED C00LD0Uf) IS UNDER CONSIDERATION AS THE NEXT STEP.
C.
A PRIMARY COOLANT SYSTEM SAMPLE IS PLANNED TO BE TAKEN APRIL 10 D.
HYDROGEN CONCENTRATION IN CONTAINMENT IS ABOUT 1 7%.
ENVIRONMENTAL STATUS AS OF APRIL 10 A.
OFFSITE RADIATION LEVELS IDENTIFIED BY NRC SURVEY TEAMS RANGE BETUEEN 02 -
2 MR/HR.
THE HIGHER LEVEL LASTED ONLY A SHORT TIME AND IS BELIEVED TO BE ASSOCIATED UITH OPERATION OF THE UASTE GAS COMPRESS 0kS.
THE RESULTS SERE 0 STAINED FROM ROUTINE SURVEYS PERFORMED ON THE EAST AND UEST SIDE OF THE SUSQUEHANNA RIVER AT DISTANCES OF UP TO 4 MILES NORTH AND SOUTH OF THE SITE.
B.
THE FOLLOUING SURVEY FLIGHTS UERE CONDUCTED DURING APRIL 9, 1979:
TIME MAX RAD. LEV. LOCATION DISTANCE FROM SITE 12:35-13:05 ENR/HR SECTOR 235-270 1 MILE 15:05-16:45 1MR/HR SECTOR 120 1 MILE C.
NO NEU DATA UERE REPORTED FOR MILK, UATER, AND VEGETATION SAMPLES.
D.
OFFSITE DOSE RATES AS DETERMINED BY NRC THERM 0-LUMINESCENT DOSIMETERS {TLDS} INDICATE THAT PRESENT RADIATION LEVELS ARE IN CLOSE AGREEMENT WITH EXPECTED NATURAL BACKGROUND LEVELS.
G.
DOSE RATES {47 LOCATIONS} AS MEASURED BY NRC THERMO-LUMINESCENT DOSINETERS HAVE RAGNED FROM O.01 TO 0 05 MILLIROENTGENS PER HOUR FOR THE 24-HOUR PERIOD OF APRIL 9 C3 LAR.EUR, NRC END 117 074 UNCLASSIFIED
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