ML19220D022
| ML19220D022 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/10/1979 |
| From: | Lafleur J NRC OFFICE OF INTERNATIONAL PROGRAMS (OIP) |
| To: | INTERNATIONAL ATOMIC ENERGY AGENCY |
| References | |
| NUDOCS 7905160195 | |
| Download: ML19220D022 (3) | |
Text
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A I
g o - 3 2 C)
NOTE: CONTINUATION OF ACTION LINE ATTACHED UNCLASSIFIED USNRC:JDLAFLEUR 4/10/79: 492-7788 OES/ NET /IEC: DHCO )PER EU3/RPE:
UBARMON
{ INFO}
EA/RA:
PCLEVELAND
{ INFO}
NEA/RA:
HENGELBRECHT
{INF0] ARA:
GJONES/JHENNEKE
{INF0}
IO: SCI:
AJILLSON
{ INFO}
L/N:
RJ8ETTAUER
{ INFO}
IMMEDIATE ATHENS, BERN IMMEDIATE, BOMBAY IMMEDIATE, BONN IMME-DIATE, BRASILIA IMMEDIATE, BRUSSELS IMMEDIATE BUENOS AIRES IMMEDIATE, USIAEA, USOECD, USEEC - PASS TO PARA 1 PARTIES ASAP E.O.
11652:
N/A TAGS: TECH,
SUBJECT:
THREE MILE ISLAND REACTOR STATUS REF:
A-0221 1-ADDRESSEES REQUESTED TO PASS FOLLOUING INFORMATION TO 0FFICIAL NRC CONTACTS IN HOST GOVERNMENTS AND TO VISITING SENIOR U.S. OFFICIALS, ASAP, DURING DAYLIGHT HOURS, AND TO USE AS APPROPRIATE IN ANSUERING INQUIRIES.
PLEASE NOTE THIS INFORMATION IS PRELIMINARY AND NOT FULLY EVALUATED.
2 TERMINATION OF RECOMMENDED LIMITED EVACUATION GOVERNOR THORNBURGH OF PENNSYLVANIA ON APRIL 9 UITHDREW HIS MARCH 30 RECOMMENDATION THAT PREGNANT WOMEN AND PRE-SCHOOL CHILDREN EVACUATE THE AREA 0F FIVE-MILE RADIUS AROUND THE THREE MILE ISLAND NUCLEAR POUER PLANT.
3 PLANT STATUS AS OF 6 A.M. APRIL 10 A.
BULK COOLANT INLET AND OUTLET TEMPERATURES REMAIN AT ABOUT 280 DEGREES F.
THE AVERAGE CORE THERMOCOUPLE TEMPERATURE IS ABOUT 295 DEGREES F, AND THE HIGHEST THERMO-C0UPLE READING IS ABOUT 400 DEGREES F.
9 A 24-HOUR PERIOD OF ADDITIONAL DEGASIFICATION BY REDUCING PRIMARY PRESSURE TO 400 PSIG IN SMALL DECREMENTS 7905160/9p j
[,,
UNCLASSIFIED 119 2, a,j
'. 9 UNCLASSIFIED l2 UAS COMPLETED ON APRIL 9 NO SIGNIFICANT CHANGE IN REACTOR COOLANT PUMP VIBRATION OCCURRED DURING THIS PERIOD.
NOISE MEASUREMENTS DID INDICATE SOME GAS IN THE COOLANT AT LOWER PRESSURES, UITH RETURN INTO SOLUTION OVER TIME.
THE LICENSEE PLANS TO REPEAT THE DEGASSING OPERATION, CYCLING DOWN TO APPROXIMATELY 300 PSIG, AND SUBSEQUENTLY TO HOLD REACTOR COOLANT SYSTEM PRESSURE AT APPROXIMATELY 1000 PSIG.
A PHASED C00LDOUN 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.?*..
/
4.
ENVIRONMENTAL STATUS AS OF APRIL 10 A.
OFFSITE RADIATION LEVELS IDENTIFIED BY NRC SURVEY TEAMS RANGE BETWEEN 02 -
2 MR/HR.
THE HIGHER LEVEL LASTED ONLY A SHORT TIME AND IS BELIEVED TO BE ASSOCIATED WITH OPERATION OF THE WASTE GAS COMPRESSORS.
THE RESULTS UERE OBTAINED FROM ROUTINE SURVEYS PERFORMED ON THE EAST AND WEST SIDE OF THE SUSQUEHANNA RIVER AT DISTANCES OF UP TO 4 MILES NORTH AND SOUTH OF THE SITE.
B.
THE FOLLOUING SURVEY FLIGHTS WERE CONDUCTED DURING APRIL 9, 1979:
TIME MAX. RAD. LEV. LOCATION DISTANCE FROM SITE 12:3a-13:08 2MR/HR SECTOR 235-270 1 MILE 15:05-16:45 1MR/HR SECTOR 120 1 MILE C.
NO NEW DATA UERE REPORTED FOR MILK, UATER, AND VEGETATION SAMPLES.
D.
OFFSITE DOSE RATES AS DETERMINED BY NRC THERMO-LUMINESCENT DOSIMETERS {TLDS} INDICATE THAT PRESENT RADIATION LEVELS ARE IN CLOSE AGREEMENT UITH EXPECTED NATURAL BACKGROUND LEVELS.
G.
DOSE RATES {47 LOCATIONS} AS MEASURED BY NRC THERMO-LUMINESCENT DOSINETERS HAVE RAGNED FROM 0 01 TO O.05 MILLIROENTGENS PER HOUR FOR THE 24-HOUR PERIOD OF APRIL 9 YY UNCLASSIFIED
ACTION PRECEDENCE CONTINUED:
INNEDIATE COPENHAGEN IMMEDIATE HELSINKI IMMEDIATE LONDON IMMEDIATE MADRID IMMEDIATE MANILA IMMEDIATE MEXICO CITY IMMEDIATE NEU DELHI IMMEDIATE OSLO IMMEDIATE PARIS IMMEDIATE REYKJAVIK IMMEDIATE RIO DE JANEIRO IMMEDIATE-RCME IMMEDIATE SEOUL IMMEDIATE STOCKHOLM IMMEDIATE TEHRAN IMMEDIATE TEL AVIV IMMEDIATE THE HAGUE IMMEDIATE TOKYO IMMEDIATE VIENNA 119 217
.