ML20116C358

Discusses 960528 Incident Involving Brief Combustible Gas Burn During Dry Storage Container Shield Lid Welding

ML20116C358
Person / Time
Site:	Point Beach
Issue date:	05/29/1996
From:	Maxfield G WISCONSIN ELECTRIC POWER CO.
To:	Castell C, Oconnell B, Pfaff S NRC
Shared Package
ML20116B333	List: ML20116C129 ML20116C264 ML20116C347 ML20116C358
References
FOIA-96-244 PBM-96-0320, PBM-96-320, NUDOCS 9607310110
Download: ML20116C358 (3)

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INTERNAL

( CORRESPONDENCE s PBM 96-0320

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To: C. A. Castell B. D. O'Connell S. A. Pfaff S. J. Zepplin From: G. J. Maxfield Date: May 29,1996

Subject:

INCIDENTINVESTIGATIONII 96-01 BRIEF COMBUSTIBLE GAS BURN DURING DRY STORAGE  !

CONTAINER SHIFTD LID WELDING Copy To: R. E. Link W. B. Fromm T. C. Guay G. J. Maxfield

. J. G. Schweitzer R. D. Seizert T7.4.3 l

l At approximately 0245 hours0.00284 days <br />0.0681 hours <br />4.050926e-4 weeks <br />9.32225e-5 months <br /> on Monday, May 28,1996, during initiation ofwelding the shield lid inside the third dry fuel storage container, an unidentified combustible gas briefly ignited. ;

ignition slightly cocked the shield lid. Continuous air measurements in the cask decontamination area showed no measurable radioactivity. There were no personnel injuries as a result of this '

event. An initial activity plan focused on notification of the NRC resident inspector; y  ;

determination ofimmediate reporting requirements; identification and monitoring of the source of !

the gas; removal of the shims and replacement of the shield lid; and preparations for returl loaded container to the spent fuel pool.

I would like you to participate on an incident investigation team to review this event. The of the iiwestigation should include:

Determination of the root cause(s) of this event using Taproot root cause techniques.

Identification of the source of the gas.

A review of welding procedures, processes, and work practices, including purging du welding as is the normal practice for primary side welding activities, positioning of the person performing the welding and sampling for combustible gases.

An evaluation ofoperating experience at other utilities using the VSC-24 multi-assemi sealed basket and with CarboZinc coating.

o A review of precursors to this event. The precursors may include, but not be limited to previous evaluations of the protective coating and everiences during the loading of the previous two containers.

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9607310110 960715 PDR FOIA PDR g[

... DU.MS96-244

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May 29,1996

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l Mr. Castellis appointed chairman of this incident investigation team. It is anticipated that the 1

scope of this investigation will not need to be more broad then detailed above; however, should the team believe that the scope needs to be changed, this should be discussed with me. I ,,

anticipate that this investigation can be completed by Friday, June 7,1996, The investigation should follow the instructions provided in procedure NP 5.3.3, " Post-Incident Critique and Investigation." Thus, your team will prepare a report ofyour investigation for me, i and will present your report to the Manager's Supervisory Staff. The report should be prepared Friday, June 14,1996.

G. J. eld Plant Manager

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• POINT BEACH VSC-24 STORAGE CASK EVENT - MAY 28, 1996 DISCUSSION

• Event Followuo AIT Findings & Conclusions Vendor Inspection Findings

- Suamary of Public Concerns 6 Injtial Reaulatory Actions

- Issued IN 96-34 on May 31. 1996 .

- CALs Issued June 3. 1996 to Affected Licensees (Pt. Beach. Palisades. ANO),

e future Reaulatory Actions Generic Communications:-

Cask Venders Utilities operating or planning ISFSIs .

- Modify SRP for Storage Casks

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