ML20101U669
| ML20101U669 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek, 05000000 |
| Issue date: | 07/05/1968 |
| From: | Ritter G JERSEY CENTRAL POWER & LIGHT CO. |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20084S682 | List: |
| References | |
| FOIA-84-318 2403, NUDOCS 8502070530 | |
| Download: ML20101U669 (1) | |
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- TLXA135 TLX222 (51)PD208 P MPA256 PD MORRISTOWN NJER 3 515P EDT DOC ' PETER A MORRIS DIRECTOR, DIVISION OF REACTOR LICENSING UNITED STATES ATOMIC ENERGY COMMISSION WASHDC
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SUBJECT:
OYSTER CREEK REACTOR VESSEL REPAIR THIS IS IN RESPONSE TO YOUR LETTER OF JUNE 25, 1968 TO MR JOHN s
E LOGAN VICEPRESIDENT JERSEY CENTRAL POWER AND LIGHT CONCERNING RELEASE OF THE TWO REMAINING STUB TUBES FOR REPAIR. THESE STUB TUBES ARE DESIGNATED S3 AND T4 IN AMMENDMENT NUMBER 35. WE ARE PROCEEDING.TO IMPLEMENT THE ACTION'S OUTLINED ON PAGE ONE OF YOUR LETTER AS YOU HAVE REQUESTED. WITH REGARD TO PAGE TWO WHICH WOULD INVOLVE EXPOSURE OF CLAD AND UNCLAD SAMPLES OF STUBE TUBE MATERIAL TO THE REACTCR COOLANT WE ARE UNAELE'TO D'ETERPTTNE HOW ANY MEANINCFUL INFORMATICN COULD BE OBTAINED FROM SUCH A SURVEILANCE PROGRAM. fHE REASONS FOR THIS ARE AS FOLLOWS: CNE-AS A RESULT OF THE STUB TU3E REPAIR ONLY CLAD STUB TUPE MATERIAL WILL BE EXPOSED TO THE REACTOR COOLANT.
THE CLADDING MATERIAL IS TYPE-30CL STAINLESS STEEL WHICH WAS l
DISCUSSED IN AMENDMENT NUMBER 37 IS MORE RESISTANT TO INTEGRANULAR CORROSION THAN THE AUSTENITIC STAINLESS STEEL IN COMMON USE IN REACTOR PLANTS. TWO--IT IS NOT FEASIBLE TO SIMULATE IN CLAD OR UNCLAD SAMPLES THE ACTUA si OPERATING CONDITIONS TO WHICH THE STUB TUBES WILL EE EXPOSED (I.E., THE THERMAL GRADIENTS, PRESSURE AND RESIDUAL STRESSES TO WHICH THE SQB TUBES ARE SUBJECTED.)
IT IS THEREFORE OUR OPINICN THAT THERE IS INSUFFICIENT TECHNICAL JUSTIFICATION FOP CARRYINE'0UT A STUE TUEE SAMPLE SURVELIANCE PROGRAM. ACCORDINGLY WE ARE PRESENTLY PRCCEEDING TO.CCMPLETE THE STUB TUEE REPAIR OPERATION INCLUDING CLADDING OF THE REMAINING TWO STUB TUBES ON THE BASIS THAT A STUB TUBE MATERIAL SAMPLE SURVELIENCE PROGRAM WILL NOT EE FEQUIRED. FOR YOUR INFORMATION AT PRESENT THERE ARE TWO REMAINIUS SAMPLES OF UNCLAD STUBTUBE MATERIAL (APPROX 1/2" PY I INCH AND 1/2" BY 1/2" SURFACE AREA) l-AND TWO SAMPLES OF CLAD STUE TU':E MATERI AL (APPROX 90 DEGREE SEGMENTS OF THE TWO RING SAMPLES REMOVED FROM CLAD STUB TUBES).
FINAL DISPOSITION OF THESE SAMPLES HAS NOT YET BEEN DETERMINED G H RITTER JERSEY CENTRAL POWER AND LIGHT CO PO B0X 55 MORRISTOWN
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