ML20212L051
| ML20212L051 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Fermi |
| Issue date: | 02/27/1985 |
| From: | Mccormickbarge NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20212J657 | List:
|
| References | |
| FOIA-86-202 NUDOCS 8701290299 | |
| Download: ML20212L051 (2) | |
Text
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February 27,1985,,, llAR -3 R! I;: 213
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MEMOR ANDUM FOR: Rill Files g
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C. E. Norelius, Director, DR P M '
R. F. Warnick Chief, Projects Branch 1 R. C. Knop, Chief. Projects Section IC FR OM:
J. W. McCormick-Barger, Project inspector, Section 1C
SUBJECT:
FERM12 ALLEG ATION Rill-85-0020 WELDING /BR AZlNG P R O BLEMS.
On February 5,1985. J. Kalkman from the Office of Investigation (Region Ill)
I.
reported a possible technical related allegation received by him during an a
interview with alleger (ex-employee of Wismer/Becker Mat Fermi 2). Su 'equently, Messers. Kalkman and J. McCormick-Barger called the alleger (February 5,1985) to obtain more specific information. The following allegations were received:
1.
The alleger reported performing brazing operations on 2"
copper tubing, possibly used as a backup instrument air header for the Control Rod Drive System (CRDS). He stated that the copper header ran through the Northwest and Southwest quadrants of the first floor of the Reactor building.
The alleger stated that he used silver solder to perform tie-in brazing to the existing copper header.
During brazing operations, the alleger noticed that existing joints located near the brazing locations were degrading (joints losing solder seal). Since the silver solder requires temperatures approaching 1100 F to perforg the brazing operation and 50/50 (Lead / Tin) solder melts at 300 F, the alleger concluded that existing joints were brazed using 50/50 solder which he felt was not appropriate for the particular application.
He went on to state that the joints which degraded were repaired by himself prior to completing the assigned job.
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RIII Files 2
February 27, 1985 2.
The allegers second concern was a reiteration of the original auegation reported to R. Farreu of the N R C on May 3, 1983, at the Davis Besse Nuclear Power Plant (see letter from R.
E.
Farreu to Region HI file dated June 1, 1983) and a subsequent phone 'can with B. Little (Fermi 2 SRI at that time) and the aueger on May 9,1983 (see letter from B. H. Little to Region D1 file dated May 23, 1983).
The only new information obtained was that after performing the undocumented weld
- repair, the alleger stated that the welds in question were NDE examined and accepted by Nuclear Energy Service (NES) inspectors.
Inspection Findines I
- 1. P. Byron, the current Fermi 2 SRI reviewed the DECO drawings and Specifications for Instrument air headers and made the following conclusions:
- a. Air headers for the CRDS are stainless steel.
- b. Air headers for the CRDS are non Q A 1 systems, i
dwg. 61721-2453 sheets 1, 2, 3, 6 and 7).
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- d. For copper air headers DECO Specification 3071-31 section 12.16.3 allows 50/50 (Lead / Tin) solder for joints inside buildings. Silver solder is required for underground applications.
It is therefore concluded that the allegation does not require further followup since use of 50/50 solder is an acceptable material for copper joints inside buildings.
associated with the reactor recirculation loop was extensively investigated and reported in the letter from B. H. Little to Region HI file (dated May 23, 1983).
The investigation revealed that no records could be found that supported the auegers statement that repairs were required or made to the sman bore piping. The additional information, obtained from the aHeger, that NDE was performed and accepted after the repairs were made, supports the NRC i
i tinding in that Final " accepted" NDE records of the welds in question were found and reviewed.
o Conclusion With the information provided no technical safety significance has been found
-to exist.
The allegers concerns are stin being pursued by the Office of Investigation for potential wrong doing.
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J. W. McCormick-Barger i
Project inspector
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