ML20064L934

Interim Deficiency Rept Re Installation of HVAC Sys Components.Initially Reported on 830125.Procedures Revised, Design Tolerances Clarified & safety-related HVAC Field Installations Reinspected

ML20064L934
Person / Time
Site:	Byron
Issue date:	02/07/1983
From:	Tramm T COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 5943N, NUDOCS 8302150419
Download: ML20064L934 (2)

Text

,

Commonw=lth Edison

. one First National Plaza, Chicago, Ilknois

- {v ) Address Reply to: Post Office Box 767 s Chicago. Illinois 60690 February 7, 1983 Mr. James G. Keppler, Regional Administrator Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Byron Station Units 1 and 2 HVAC Installation NRC Docket-Nos. 50-454 and 50-455

Dear Mr. Keppler:

On January 25, 1983 Commonwealth Edison Company notified Mr. Julian Hinds of your office of a deficiency reportable pursuant to 50.55(e) regarding the installation of HVAC system components at Byron Station. For your tracking purposes this deficiency is num-bered 83-01. This letter fulfills the 30-day reporting requirement.

Description of Deficiency Safety related ductwork, hangers, and accessories were not installed in accordance with dimensional tolerances and typical details as shown on the Sargent and Lundy design drawings. There also was a deficiency in implementation of the Reliable Sheet Metal Q.A. Program since these dimensional deficiencies were not identified during the Q.C. inspection process. These deficiencies j have been documented on a system / area basis on CECO NCR's 757 thru 766. '

Analysis of Safety Implications Proper operation of safety-related HVAC equipment is required to assure operation of other safety-related equipment during design basis transients. The safety implications of this reportable deficiency could only be assessed after a case-by-case analysis of specific dimensional deviations.

Corrective Action To Be Taken The following actions are being taken to correct the deficiencies:

1. Reliable Sheet Metal procedures addressing installation and inspection are being revised to maintain better control of I these activities.

FE8 81983 i 8302150419 830207 l gDRADOCK05000g

J. G. Keppler February 7, 1983

2. The present design tolerances are being clarified and additional tolerances are being provided in order to achieve proper installation and inspection of HVAC Systems.

3. Safety-related HVAC field installations work is being reinspected in accordance with revised procedures to insure compliance with design details and tolerances.

4. Any necessary rework will be completed prior to fuel load.

Please address further questions regarding this matter to this office.

Very truly yours, T. R. Tramm Nuclear Licensing Administrator 1m cc: Director of Inspection and Enforcement 4

5943N l