Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
SSINS No.: 6835
IN 84-30
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
April 18, 1984
Information Notice No. 84-30: DISCREPANCIES IN RECORD KEEPING AND
MATERIAL DEFECTS IN BAHNSON HEATING,
VENTILATION, AND AIR CONDITIONING UNITS
Addressees:
All nuclear power reactor facilities holding an operating license (OL) or
construction permit (CP).
Purpose:
This information notice is being provided to inform licensees of a
potentially significant problem pertaining to heating, ventilation, and air
conditioning (HVAC) equipment manufactured by the Bahnson Company. The NRC
expects that recipients will review this notice for applicability to their
facilities. Suggestions contained in this information notice do not
constitute NRC requirements, therefore, no specific action or written
response is required.
Description of Circumstances:
Inspections concerning allegations about the Bahnson Company (a division of
Flakt, Inc.) of Winston-Salem, North Carolina, on September 7-10, 1982, and
February 2, 1984, as well as site inspections of Bahnson-supplied equipment
at Millstone 3 and Shearon Harris have found discrepancies in record keeping
and material defects. Records for liquid penetrant inspections conducted at
the factory were not completed during the actual manufacture of the charcoal
adsorption units, but were constructed from travelers, the inspectors'
personal notes, and from memory.
Installed units at Millstone 3 had low-strength carbon steel fasteners sub-
stituted for the required ASTM-A449 fan motor anchor bolts and selftapping
stainless steel screws were substituted for ASTM-A193-GR B8 bolts used for
mounting the cooling coils. In addition, the weld filler material heat lot
number was not recorded for eight of the units.
The units inspected at Shearon Harris had welds with cracks, lack of fusion,
and undercut or material reduction which exceeded 1/64 inch. There were also
missing welds and welds not made in accordance with design drawings. When
some of the welds were reinspected by dye penetrant, unacceptable
indications were found.
8403140284
.
IN 84-30
April 18, 1984
Page 2 of 2
A list of facilities supplied with Bahnson HVAC equipment follows:
FACILITY QUANTITY/TYPE OF UNIT APPROX. SHIPPING
DATE
Shoreham 4 air handling units 9/75-5/76
Zimmer 16 air handling units 5/76-77
Wolf Creek 4 air handling units 10/79-11/79
Callaway 4 air handling units 10/79-11/79
WPPSS 1&4 24 evaporative air coolers 77-78
12 charcoal adsorption units 8/81-3/83
LaSalle 12 coil cabinets 77
Summer 21 air handling units 77-78
Shearon Harris 47 air handling units 7/79-11/83
6 charcoal adsorption units 7/82-8/82
Catawba 2 air handling units 12/78
Oconee 1 air handling unit 8/81-9/81
Yellow Creek 14 charcoal adsorption units 3/82
Palo Verde 6 charcoal adsorption units 9/18-12/81
Millstone 3 10 air handling units 1/82-12/82
Comanche Peak 21 air handling units 79-81
No written response to this information notice is required. If there are any
questions regarding this matter, please contact the Regional Administrator
of the appropriate NRC Regional Office or this office.
Edward L. Jordan, Director
Division of Emergency Preparedness
and Engineering Response
Office of Inspection and Enforcement
Technical Contacts: E. T. Baker, IE
(301) 492-4540
M. S. Wegner, IE
(301) 492-4511
Attachment:
List of Recently Issued IE Information Notices
