ML19220C865

Preliminary Info Re Plant Status.Containment Atmosphere Measurements Indicate About 2% Hydrogen

ML19220C865
Person / Time
Site:	Crane
Issue date:	04/05/1979
From:	Lafleur J NRC OFFICE OF INTERNATIONAL PROGRAMS (OIP)
To:	Abraham P, Cunningham J, Jennekins J CANADA ATOMIC ENERGY CONTROL BOARD, INDIA, IRELAND
References
NUDOCS 7905160009
Download: ML19220C865 (4)

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g US NUCLEAR REGULATORY COMMISSION OFFICE OF INTERNATIONAL PROGRAMS PRIORITY UNCLASSIFIED WASHINGTCt!, D.C. 20555 TLX: 710-824-0415 A-5-79 27788 XX J. D. LAFLEUR, JR., CEPUTY DIRECTOR, OIp NUCLEAR E?iERGY BOARD JON H. JEN!iEKINS, PRESIDE'IT ATTN: JOHN CUNNINGHAM AECB CUSLIN, IRELAllD OTTAWA, CANADA TLX: 205-10 TLX: 053-3771 P. ASRAHAM JU SUNG i

DAE SAFETY REVIDI CCMiITTEE CCNA BHABHA ATC!ilC RESEARCH CE!!TRE 4301 Connecticut Ave.NW

{

TRCMBAY, SCNBAY, INDIA Suite 132 i

Washington, D.C. 20003 ROY SIMPKI?!S U.S. EMEASSY Or. Clyde McClelland EELGRADE YUGOSLAVIA U.S. Embassy 2?. 11529 Ottawa, Canada TLX: 0533582 SUSJECT:

THREE MILE ISLAND REACTOR STATUS THE FOLLOWING PRELIMINARY INF0_RfATIO!1 IS PROVIDED ON THE THREE MILE ISLNtD NUCLEAR POWER PLANT IfiCIDENT OF MARCH 28, 1979. FOR USE AT YOUR DISCRETIO!!.

PLEASE NOTE THIS INF0Pf% TION IS PRELIMINARY AND NOT FULLY EVALUATED.

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PLANT STATUS A.

REACTOR PRESSURE REMAINS NEAR 1000 PSI UITH BULK CORE COOLANT INLET AND OUTLET TEMPERATURES APPROXIMATELY SSO DEGREES F.

CORE THERM 0CUPLE READINGS ARE RELATIVELY UN-CHANGED AND INDICATE A MAXIMUM TEMPERATURE OF 462 DEGREES F UHICH IS UELL SELOU SATURATION TEMPERATURE FOR THE PRESENT

?,EACTOR PRESSURE.

THREE THERMOCOUPLE READINGS REhAIN ASOVE 400 DEGREES F.

THE NUMBER OF THERMOCOUPLE READINGS THAT ARE SE'NG MONITORED HAS SEEN REDUCED TO 90 S.

CONTAINNENT ATMOSPHERE MEASUREMENTS INDICATE ASOUT 5%

HYDROGEN.

ONE HYDROGEN RECONSINER IS IN OPERATION, UITjg j tj C)

ANOTHER UNIT ON STANDSY.

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J UNCLASSIFIED l2 AN ALTERNATE METHOD OF DETERMINING THE PRESSURIZER LEVEL SY MONITORING THE STEAM EPACE PRESSURE AND UATER SPACE PRESSURE IN THE PRESSURIIER.

TESTING PROCEDURES ARE UNDER REVIEU.

THE PRESSURIZER IS BEING VENTED TO THE CONTAINMENT FOR ABOUT 15 MINUES EVERY b-6 HOURS.

3 PL ANS FOR USE OF THE ROSOT TO O9TAIN A PRIMARY SYSTEM SAMPLE HAVE SEEN DEVELOPED..

3 ENVIRONMENTAL STATUS A.

PRELIMINARY ANALYSIS BY FDA 0F 16 MILK AND MISCEL' A-NEOUS FOOD PRODUCTS COLLECTED ON APRIL 2, 1979, SH'sWED NO DETECTABLE IO. DINE CONCENTRATIONS IN 12 SAMPLES AND IODINE RANGING FROM 12-18 PCI/L IN 4 MILK SAMPLES.

THE STATE OF MARYLAND REPORTED ON APRIL 4,

1979 THE RESULTS OF ANALY!IS OF 12 MILK SAMPLES COLLE~TED FRON 3 70 20 MILES FROM InE SITE.

ALL SAMPLES UERE REPORTED AS LESS THAN THE MININUM DETECTABLE AC TIVITY {MD A}.

ONE PROCESS MILK SAMPLE FROM HARRIS 5URG ALSO UAS REPORTED BY THE STATE OF MARYLAND AS LESS THAN MDA.

THREE UATER SAMPLES, TUO AT CONEU AGO AND ONE FROM HOLTUOOD D AM, UERE REPORTED AS LESS THAN MDA SY THE STKTE OF MARYLAND.

2 FDA COLLECTED 5 OTHER NILK SAMPLES ON APRIL 3, 1979, TUO OF UHICH SHOUED IODINE CONCENTRATIONS OF 12 AND 17 PCI/L.

ONE SHOUED NO DETECTABLE IGDINE AND THERE ARE No c*.r e m. i d.= ^v a s

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SHOUED A CESIUM CONCENTRATION OF 13 PCI/L; THERE ARE NO 4

CESIUM RESULTS FOR THE OTHER FOUR.

THE STATE OF PENNSYL-VANIA ANALYSIS OF 13 MILK SAMPLES COLLECTED ON APRIL 3, 1979 SHOUED ONE WITH IODINE AT 19 PCI/L, 13 UITH NO DETECTABLE IODINE, AND 1 UITH NO RESULT.

FOUR SHOUED CESIUM LEVELS RANGING FROM 10-Eb PCI/L.AND THERE ARE NO RESULTS FOR' THE OTHER 11 SAMPLES.

ALL OF THE SAMPLES COLLECTED SY THE STATE AND FDA UERE SPLIT SAMPLES, I.E.,

SHARED TO 087AIN INDEPENDENT RESULTS.

C.

CONTINUOUS GROUND LEVEL RADIATION SURVEYS PERFORMED ON APRIL 4, 1979 SY THE NRC SURVEY TEAMS ON THE EAST ANL UEST SIDES OF THE SUSQUEHANNA RIVER FROM A DISTANCE OF 4 MILES NORTH TO 4 MILES SOUTH OF TMI SHOUED RADIATION LEVELS AVERAGING LESS THAN 0 03 MR/HR ON THE EAST SIDE OF THE RIVER AND 0 01 TO 0 04 MR/HR ON THE UEST SIDE OF THE RIVER.

PREVALENT UIND DIRECTION DURING THE DAY UAS FROM THE EAST.

D.

SIX SURVEY FLIGHTS UERE PERFORNED ON APRIL 4,

1979 AT CCC1, 0300, ObCD, 0900, 1200 AND 15E2 HOURS.

THE FLIGHTS IDENTIFIED THE PLUME TO SE IN THE SECTIONS OF 200 DEGREES AND 300 DEGREES.

THE MAXIMUM RADIATION LEVELS UERE DETECTED DURING THE CbCD FLIGHT DURING UHICH LEVELS OF 12 MR/HR UERE DETECTED USING PORTABLE SURVEY METERS.

i 17 150 THE 1522 FLIGHT USED NORMALLY INSTALLED ARMS INSTRUMENTA-UNCLASSIFIID

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UNCLASSIFIED l3 TION AND MEASURED RADIA720N LEVELS OF ABOUT O.1 MR/HR

{A50UT 5 TIMES SACKGROUffD} AT 1 MILE DISTANCE AND ABOUT 0.Ob MR/HR {ASOUT 3 TIMES BACKGROUND} AT S MILES DISTANCE.

E.

ON A:RIL 4, A 40-MINUTE. AIR SANPLE TAKEN ASOUT 0100 NEAR YOFK HAVEN, AND A 60-MENUTE SANPLE.TAKEN ABOUT 1300 IN GOLDSSORO, B O TH INDICATED LESS THAN 1 X 10-10 PCI/ML I-131 { MAXIMUM PERMISSISLE CONCENTRATION FOR UNRESTRICTED AREAS}.

F.

DOSE RATES IN POPULATED AREAS AS MEASURED SY NRC THERM 0 LUMINESCENT DOSINETERS {TLDS} SHOUED ONLY MINOR CHANGES FROM THE PREVIOUS DAY.

MINOR FLUCTUATIONS ARE EXPECTED AT THESE LOU DOSE RATES.

FOLLOHING ARE THE EXPOSURE RATES FOR PREVIOUSLY REDORTED LOCATIONS:

DOSE RATE {MILLIROENTGENS PER HOUR} 4/4/79 HIDDLETOUN O.01 GOLDSSORO 0 07 GOLDSSORO O.09 LEUISSERRY 0 03 EMIGSVILLE O.09 4.

OCCUPATIONAL RADIATION EXPOSURES.

A.

THREE OCCUPATIONAL RADIATION DOSES IN EXCESS OF THE REGULATORY LIMIT OF 3 REMS PER CALENDAR CUARTER HAVE SEEN CONFIRMED.

ALL THREE EXPOSURES UERE LICENSEE PERSONNEL AND UERE APPROXIMATELY 4 RENS {THIS INCLUDES THE TWO EXPOSURES REPORTED IN PNO-79-578}.

S.

TO DATE ON APRIL 4, 1979, THERE HAVE SEEN 19 INDIVI-DUALS UITH DOSES GREATER THAN 9 REMS SUT LESS THAN 3 REMS.

THREE DOSES ARE FOR THE PERIOD JANUARY 1 TO APRIL 4,

1979, SUT IT IS SELIEVED THE MAJORITY OF EXPOSURE UAS RECEIVED AS A RESULT OF THE INCIDENT.

HORE SPECIFIC OCCUPATIONAL EXPOSURE DATA IS EXPECTED TO BE AVAILABLE IN THE NEAR FUTURE.

5 INDUSTRIAL UASTE TREATMENT SYSTEM {IUTS}.

AS OF 0500 ON APRIL 5, 1979, THE IUTS SUMP UAS 747. FILLED UITH ABOUT 100,000 GALLONS OF CAPACITY STILL AVAILABLE.

THE STATE OF PENNSYLVANIA APPROVED RELEASE OF MATERIAL FROM THE IUTS THAT DOES NOT EXCEED PERMISSISLE VALUES.

"O RELEASES HAVE BEEN MADE AS OF 0500 W t /9/~t._d.O A, M d (

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