ML20052F794
| ML20052F794 | |
| Person / Time | |
|---|---|
| Site: | Ginna, 05000000, 05000465 |
| Issue date: | 04/06/1982 |
| From: | Hallencreutz M SWEDEN, GOVT. OF |
| To: | Lafleur J NRC OFFICE OF INTERNATIONAL PROGRAMS (OIP) |
| Shared Package | |
| ML20049H209 | List: |
| References | |
| FOIA-82-167 NUDOCS 8205130652 | |
| Download: ML20052F794 (3) | |
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1982-f4'-E6' -
TELEX NO 120/82/EF r
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ATTENTION ** JOSEPH.D. LAELEUR 3
OFFICE OF INTERNATIONAL PROGRAMS W
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IIIFORMATION 1982-04-B2
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SVEDISH NUCLEAR POVER INSPECTORATE CSKI} GRANTS PERMISSION TO 1
RINGHALS 3 TO OPERATE AT REDUCED POWER DURING'1 500 Honts a.
3 ON 1982-04-02 SKI GRANTED PERMISSION TO SSPB T'O START THE
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REACTOR RINGHALS 3 AND TO OPERATE IT FOR l SEE E AT REDUCER, y
ej, POWER - MOSTLY AT 49 0#C.
IN THE EVALUATION MEMORANDUM - ON WHICH..ThE PERh!SSION IS BASED'
- SHI ESPECIALLY EMPHASIZES THE FOLLOVING. FACTORS, ESSENTIAL I
'..TO THE REALIZATI.ON OF THE SUGGESTEDs LIMITED OPERATION PROGRAM i
- VITHOUT SETTING ASIDE REACTOR SAFETY.
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8205130652 820416 PDR FOIA UDELL82-167 PDR
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g THERE NOV EXISIST BASIC UNDERSTANDING' 0F. TSE 1/ EAR MECHANISM,'
CONFIRMED BOTH BY EXPERIMENTS MADE AT MOD'EL-TESTS AT ALVY M EBY i
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HYDR 0 LABORATORY AND ALSO.BY MEASURING ~~ RESULTS FORM OPERATION
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TO BE POSSIBLE - VITH REASONABLE RELIABILETY - T0 ESTIMATE AN UPPER LIMIT OF THE VEAR DURING THE OPERATION APPLIED.FOR.,
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. go pg THOSE TUBES, WHICH TODAY SHOV'A VEAR OF1%S'SfMAN 58=B79 0F-
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THE MATERIAL-THICHNESS, -RE ESTIMATED'TO VAVE AN UPPER LIMIT' S */s OF ADDITIONAL VEAR OF 6=:0#0. CONSIDERI.NG THE PRESENT XNOWLEDGE.
g OF THE VEAR-MECHANISM, THERE THUS EXISTS SUFFICIENT SAFETY i
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MARGINS AGAINST SUCH CONTINUED VEAR, VHICN VOULD POSSIBLY, ENDANGER THE STEENGTH OF UNPLUGGED Tt/BES.
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I' T51E PLUGS VITH CONTROLLED LEAHAGE - SUGGESTED BY SSP CONSIDERABLY TO THE SAFETY OF PRESENT OPERATING CONDITIONS.
I IN SPITE OF PRECAkJTIONS TAXEN - BE A' PERFORATION h
SHOULD THERE -
0F ANY OF THE TUBES, THERE VILL BE AN INSTANT WARNING OF THIS.
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"h THE POSSIBLE LEAHAGE FROM THE DAMAGED TUBES VILL BE 'HEPT TO ie A MINIMUM BECAUSE OF THE SMALLNES OF THE HOLE IN THE PLUG.
THUS A PO'TENTIAL TUBE PERFORATION VILL NOT INVOLVE A SECURITY-RISH BECAUSE IT WILL NEITHER EF[ECT THE COOLING OF THE REACTOR-CORE NOR VILL IT LEAD TO SUBSTANTIAL' RADI0 ACTIVE DISCHARGE.
THE TOTAL OF 28 TUBES HAVE BEEN PLUGGED IN ACCORDANCE TO THE CRITERIA, VHICH HAVE PREVIOUSLY BEEN REMITTED TELEX 1982,
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1 THE SOLUTION TO A FUTURE RECONSTRUCTION HAS. BEEN ACCOUNTED FOR.
- 'l EVEN THOUGH THE CONSTRUCTION-IDEAS ARE NOT GIVEN IN DETAIL,
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THE SUGGE TIONS ARE SP'.CIFIED TO SUCH EXTENT, VHICH MAMES IT POSSIBLE TO SAY THAT THE OPERATING PROGRAM SUGGESTED DOES NOT
' INTERFERE VITH T.HE POSSIBL.ILITIES OF A RECONSTRUCTION - SUFFICIENT,'
FROM THE REACTOR-SAFETY POINT OF VIEW.
e EMERGENCY INSTRUCTIONS AND TRAINING OF THE OPERATING PERSONNEL t
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- CONCERNING HANDLING OF TUBE LEAKS AND MULTIPLE TUBE LEAHS
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- EAVE BEEN IMPROVED. THE RECENT INCIDENT AT THE GINNA-REACTOR' HAS SUPPLIED CLEAR EXAMPLES OF THE DEMANDS CONFRONTING THE
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I N-OPERATING PERSONNEL.
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TO SUM UP, SHI FOUND - VHEN JUDGING THE COMPLETE REPORT l
SUBMITTED BY SSPB - THAT THE OPERATING PROGRAM SUGGESTED, INCLUDING THE MEASURING-PROGRAM, CAN BE ACCOMPLISHED WITHOUT
-,", SETTING ASIDE THE. SECURITY DEMANDS NORMALLY IN EFFECT AT THE PLANT.
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SVEDISH NUCLEAR POWER INSPECTORATE lQ.
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INFORMATION SECRETARIAT I
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MARGARETA HALLENCREUTZ b
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