ML20205F752
| ML20205F752 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/01/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8511130018 | |
| Download: ML20205F752 (3) | |
Text
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TENNESSEE VALLEY AUTHORITY l
CHATTANOOGA. TENNESSEE 374of
{
400 Chestnut Street Tower II 35 0CTO@to3,rQ. (85 P
BLRD-50-438/85-08 BLRD-50-439/85-08 U.S. Nuclear Regulatory Conunission Region-II Attn:
Mr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - SOME AUXILIARY BUILDING COMMON ZONE AIR-CONDITIONING EQUIPMENT NOT SEISMICALLY QUALIFIED -
BLRD-50-438/85-08 AND BLRD-50-439/85 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-OIE Inspector Al Ignatonis on January 25, 1985 in accordance with 10 CFR 50.55(e) as NCR BLN EEB 8420. This was followed by our first interim report submitted on February 23, 1985. Enclosed is our second interim report. We expect to submit our next report on or about August 26, 1986.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
/ 771/ 4
<J. W. Hufham, Manager Licensing and Risk Protection Enclosure cc (Enclosure):
Mr. James Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Conunission Washington, D.C.
20555 I
Records Center
-Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 l
8511130018 85 38 pDR ADOCK PDR C
I An Equal Opportunity Employer hI ggy
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.1 ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 SONE AUKILIARY BUILDING COMMON ZONE AIR-CONDITIONING EQUIPMENT IS NOT SEISMICALLY QUALIFIED BLRD-50-438/85-08 AND BLRD-50-439/85-08 NCR BLN EEB 8420 10 CFR 50.55(e)
SECOND INTERIM REPORT Description of Deficiency Bellefonte Nuclear Plant (BLN) design criteria require in part that the auxiliary building common area air-conditioning (VF) system be designed and supported such that it will not fall upon or otherwise impair the functional capabilities of safety-related equipment as a result of the occurrence of a safe shutdown earthquake (SSE).
In designing the VF system, the design criteria was interpreted to mean that if no safety-related (IE) equipment was in the vicinity of the VF piping or components, the piping and components could be nonseismic. As a result, many VF system components were purchased nonseismic and installed nonseismically. Some of the piping of these nonseismic components ended up in proximity to safety-related electrical components (due to the IE equipment being added later) where a seismic event could result in the VF system equipment falling on or moving and damaging the electrical equipment.
i Where instrumentation and control (I&C) tubing and devices interfaced with piping or components designated on the 3AWO643-VF series as nonseismic, the I&C tubing and devices were also designated as nonseismic. These I&C components designated as nonseismic are also in proximity to class 1E electrical equipment where damage could occur due to movement or falling during a seismic event.
The following equipment is 1E and is in proximity to nonseismically qualified or installed heating, ventilating, and air-conditioning (HVAC) equipment.
Local instrument panels 01X-ILPC-023-A, -024-B.
Additional equipment will likely be'added to the list of affected j
components as determined by a detailed analysis of safety-related areas containing nonseismic HVAC equipment.
Interim Progress TVA will evaluate this condition with the intention of justifying use of l
the nonseismically qualified equipment by qualifying it via similarity to j
existing seismically qualified equipment, analytically proving its seismic ~
acceptability or physically restraining it so that it cannot fall or move during a seismic event. The. equipment that was not purchased with seismic
l requirements include control valves, flow elements, dampers, unit heaters, air handling units, duct heaters, fans, and air cleanup units.
At present, the control valves have been proven acceptable for seismic use; the flow elements are being analyzed; and all remaining equipment will be proven acceptable analytically or have restraints designed under an engineering change notice (ECN) which is being prepared. We have determined that the two local instrument panels addressed in the nonconformance report (01X-ILPC-023-A, -024-B) will have to be removed from the area in which they are currently installed since there is HVAC equipment (a water chiller) that cannot be seismically qualified and the area will have to be designated as a nonseismic l
area. All work will be done under the afcrementioned ECN.
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