ML20059K460
| ML20059K460 | |
| Person / Time | |
|---|---|
| Site: | Framatome ANP Richland |
| Issue date: | 01/21/1994 |
| From: | Perkins K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Femreite B SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER |
| References | |
| NUDOCS 9402020106 | |
| Download: ML20059K460 (2) | |
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JAN h I iTS4 Docket No.
70-1257 License No. SNM-1227 Siemens Power Corporation 2101 Horn Rapids Road P. O. Box 130 Richland, Washington 99352-0130 Attention: Mr. B. N. Femreite, Plant Manager 3
SUBJECT:
CLOSURE OF CONFIRMATORY ACTION LETTER This letter refers to the Confirmatory Action Letter (CAL) dated July 17, 1992, detailing the agreement between Siemens Power Corporation (SPC) and the Nuclear Regulatory Commission (NRC) resulting from the review of an event which occurred at your facility on July 16, 1992, involving the identification of moisture in the large lot blender (LLB).
In the CAL, we confirmed SPC's commitments (1) to perform an evaluation of the source of water in the off-gas line and the potential effect on the criticality analysis for the blender, (2) if any deficiencies were identified, to take appropriate corrective actions, (3) to develop a basis for continued operation of the blender, and (4) to submit your evaluation of the source of water in the off-gas line and the basis for continued operation of the blender for the NRC's review and agreement before any continued operation of the blender.
SPC submitted its response concerning these matters to the NRC on November 12, 1993.
As stated in your evaluation, although the event was within the bounds of the original criticality safety analysis, additional corrective actions were identified to prevent similar occurrences: (1) installation of a nitrogen sweep system for the removal of moisture during the blending and download stages, (2) installation of a moisture detection / shut-off system on the incoming nitrogen header, (3) revision of the standard operating procedure for blender operations to require periodic cycling of the blender auger to transfer warm powder to the outside of the blend as well as to require periodic inspection of the blender interior, and (4) completion of a test program to optimize sweep gas flows and auger operation.
We understand that on December 30, 1993, a member of your staff informed a member of the NRC Region V Office that you would evaluate the feasibility and safety benefit of installing a moisture detection device in the blender's off-gas system.
From subsequent discussions, we also understand that you have performed a new criticality safety analysis for the process testing program and that the LLB will be limited to about 9.5 kilograms of water contained in i
the total mass of uranium powder, which will be verified by Process Engineering and Criticality Safety prior to each transfer.
Additionally, Process Engineering and Criticality Safety will control separate locks on valves and will only open the valves when approved material is transferred to the blender.
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9402020106 940121'
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'O PDR ADOCK 07001257 C
k Based on our review of your response, Siemens Power Corporation has satisfied 1
the conditions of the CAL.
The NRC will verify your effectiveness in implementing your stated corrective actions and the commitments for the bases for safe startup of the blender in a future inspection.
In accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter will be placed in the NRC Public Document Room.
Sincerely,
- c...
E cj b K. E. Perkins,y Jr.
Acting Regional Administrator cc:
State of Washington L. J. Maas, Manager Regulatory Compliance bcc:
PDR DCS Inspection File H. Thompson, Jr., DEDS R. Bernero, Director, NMSS J. Lieberman, Director, OE R. Burnett, NMSS R. Pierson, FCLB/NMSS C. Smith, FCOB/NMSS M. Adams, FCLB/NMSS-
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G. Cook R. Bellamy, RI D. Collins, RII J. Grobe, RIII 3
C. Cain, RIV REGIO 1 V ]
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