ML19220C912
| ML19220C912 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/04/1979 |
| From: | Lafleur J NRC OFFICE OF INTERNATIONAL PROGRAMS (OIP) |
| To: | Abraham P, Cunningham J, Jennekins J CANADA, INDIA, IRELAND |
| References | |
| NUDOCS 7905160055 | |
| Download: ML19220C912 (2) | |
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TELEGRAPHIC MESSAGE Naani CF AGENCY PegCErtNCg h em CLA55p<AI!CN U.S. NUCLEAR REGULATORY CCM14ISSICN
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OFFICE OF INTERNATICNAL PROGRAMS
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,,w.ou, To: NUCLEAR ENERG't BOARC J.H.F. JENNEXINS, PRESIDENT ATTN: JOHN CUtiNINGHAM AECB 20-22 LOWER HATCH STREET OTTAWA, CANADA l
CUBLIN, IRELAND TLX: 053-3771 TLX: 3C6-10 JU SUNG MR. P. ABRAHAM CCNA i
CAE SAFETY REVIEW CCMMITTEE 4/30/ CouNR7dur evf [O2 BHASHA ATCMIC RESEARCH CENTRE WASHINGTCN,D.C.2^Cf3 TROMBAY, ECMBAY, INDIA ur. ulyde,,cClelland:i n
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SUBJECT:
THREE MILE ISLAND REACTOR STATUS THE FOLLCWING PRELIMINARY INFORMATICN IS PROVIDED ON THE THREE MILE i
ISLAND NUCLEAR POWER PLANT INCICENT OF MARCH 23, FCR USE AT YOUR DISCRETION.
PLEASE NOTE THIS INOFRMATION IS PRELIMINARY AND NOT FULLY EVALUATED.
79051606 5-MCUtffY CLA551RCA!:CN PaGE NO.
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01A P P'* 4 L41 C'E i 01-33.304 1
CLANT STATUS AS OF 7 AM, APRIL 4.
Av THE COOLING PATH TO REMOVE CORE DECAY HEAT CONTINUES TO SE THROUGH "A"
STEAM GENERATOR TO THE MAIN CONDENSER.
9 REACTOR PRESSURE REMAINS NEAR 1000 PSI, UITH BULK CORE COOLANT INLET AND OUTLET TEMPERATURES AT 280 DEGREES F.
CORE THERMOCOUPLE READINGS ARE RELATIVELY UNCHANGED AND INDICATE A MAXIMUM TENPERATURE OF 466 DEGREES F UHICH IS UELL BELOW SATURATION TEMPERATURE FOR THIS PRESSURE.
{0NLY THREE THERMOCOUPLES READ ABOVE 400 DEGREES F.}
GAS IS STILL INDICATED TO BE PRESENT BASED ON BUBBLE SIZE CALCULATIONS, BUT ITS VOLUME IS ERRATIC IEDICATING THE EFFECTS OF SOLUBILITY AND BUBBLE DISPERSI)N.
VENT VALVE ON PRESSURIZER HAS BEEN CLOSED AND DEGAS:FICATION CONTINUES THROUGH THE LETDOUN SYSTEM.
C.
CONTAINMENT ATMOSPHERE MEASUREMENTS INDICATE ABOUT E.1% HYDROGEN.
ONE HYDROGEN RECONSINER IS OPERATING AND AN 11-DAY TIME PERIOD IS PROJECTED FOR REDUCTION OF THE HYDROGEN CONCENTRATION TO ABOUT 1%.
AT 1430 ON. APRIL 3, ONE OF THREE PRESSURIZER LEVEL TRANSMITTERS FAILED.
ALTERNATE METHODS OF LEVEL MEASUREMENTS ARE EEING DEVELOPED AND PROCEDURES REVIEUED FOR IMPLEMENTATION UHILE CALIBRATION CAN OCCUR UITH THE EXISTING DETECTORS.
D.
PLANS TO USE A ROBOT DEVICE TO OSTAIN A PRIMARY COOLANT SAMPLE ARE BEING EVALUATED. PREOP TESTING UITH THE ROBOT IS IN PROGRESS.
E.
THE TESTS OF CONTAINMENT SUILDING GAS SAMPLE REPORTED FOR APRIL 3 HAVE BEEN DETERMINED TO BE FAULTY AND SHOULD SE DISREGARDED.
NE*J SAMPLES ARE BEING ANALYIED.
ENVIRONMENTAL STATUS A.
FDA HAS REANALYZED THE RIVER UATER SAMPLE COLLECTED THE AFTERN0ON OF APRIL 2, 1979 AT A LOCATION 2 MILES DOWNSTREAM.
THE VALUE OF 39 PIC0 CURIES PER LITER IODINE-131 PREVIOUSLY REPORTED FOR THIS SAMPLE HAS BEEN FOUND TO BE INCORRECT; NO IODINE ABOVE MINIMUM DETECTABLE LEVELS HAS SEEN FOUND.
B.
OTHER ENVIRONMENTAL MEASUREMENTS INDICATE A CONTINU-ATION OF THE TREND OF GRADUAL REDUCTION OF THE REMAINING LOW RADIATION LEVELS CAUSED BY THE INCIDENT.
LAFLEUR, NRC.
END ii8 061