Information Notice No. 85-11: Licensee Programs for Inspection of Electrical Raceway and Cable Installations
SSINS No.: 6835
IN 85-11
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
February 11, 1985
Information Notice No. 85-11: LICENSEE PROGRAMS FOR INSPECTION OF
ELECTRICAL RACEWAY AND CABLE
INSTALLATIONS
Addressees:
All licensees of nuclear power reactor facilities holding a construction
permit (CP).
Purpose:
This information notice is provided to alert recipients of potentially
significant problems identified during NRC Construction Appraisal Team (CAT)
inspections of licensee programs for the inspection of physical separation
requirements for electrical raceway and cable installations. It is expected
that recipients will review the information for applicability to their
facilities and consider actions, if appropriate, to preclude similar
problems from occurring at their facilities. However, suggestions contained
in this notice do not constitute NRC requirements and, therefore, no
specific action or written response is required.
Description of Circumstances:
Comanche Peak Units 1 and 2
During the NRC CAT inspection conducted at the Comanche Peak Steam Electric
Station in January and February 1983, a number of areas were identified in
which physical separation criteria for Class 1E electrical raceway and cable
were not met. These separation deficiencies were associated with redundant
electrical divisions, internal panel wiring, and separation from other
equipment such as mechanical components and piping.
The established facility inspection program did not provide adequate
controls to ensure that deviations from specified separation criteria were
promptly identified and corrected. This resulted in part from a licensee
decision not to inspect electrical installations for physical separation
until installation was essentially complete. (For details refer to
Construction Appraisal Team Inspection Report 50-445/83-18, 50-446/83-12.)
8502060437
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February 11, 1985
Page 2 of 4
Washington Nuclear Plant Unit 2
During the NRC CAT inspection conducted at the Washington Nuclear Plant Unit
2 in May and June 1983, it was observed that the existing program for
inspecting corrective action for identified electrical raceway deficiencies
was not adequate. Controls in the Test and Startup organization were
inadequate to ensure that deficiencies in transferred systems identified by
the contractor were corrected.
Although most of the installed Class 1E cable tray met applicable require-
ments, instances of failure to meet physical separation criteria were
identified during the CAT inspection. (For details refer to Construction
Appraisal Team Inspection Report 50-397/83-29.)
Perry Units 1 and 2
During the NRC CAT inspection conducted at the Perry Nuclear Power Plant in
August and September 1983, it was determined that separation requirements
relative to some electrical raceway installations had not been properly
inspected by site personnel. In numerous installed and inspected cable tray
segments, quality control (QC) inspections performed to determine the
acceptability of Class 1E raceway installations did not follow the
applicable procedures. Inspection records indicated physical separation
criteria to be acceptable when, in fact, a number of installations examined
during the CAT inspection did not conform to applicable requirements. In
another area, adequate procedural controls were not established to ensure
that the installation of Power Generation Control Complex (PGCC) duct covers
(barriers) received appropriate inspections. (For details refer to
Construction Appraisal Team Inspection Report 50-440/83-31, 50-441/83-30.)
Nine Mile Point Unit 2
The NRC CAT inspection conducted at the Nine Mile Point Station Unit 2
during November 1983 identified a number of deficiencies in the inspection
program for the installation of Class 1E electrical raceway and cable. These
deficiencies included the failure to perform adequate inspection, inadequate
procedural controls to ensure that installations conform to applicable
requirements, and the failure to take appropriate action when deficiencies
were identified. Inspection records indicated separation to be acceptable
when, in fact, a number of previously inspected installations examined
during the NRC CAT inspection did not conform to applicable separation
requirements. In the area of procedures, adequate installation and
inspection procedure controls had not been established to ensure that the
PGCC cable and wiring installations would conform to design requirements. As
a result, many of the cable and wiring installations in the control panels
of the PGCC did not conform to applicable separation criteria. The
inspection program failed to promptly and properly identify and correct
these separation deficiencies. (For details refer to Construction Appraisal
Team Inspection Report 50-410/83-18.)
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IN 85-11
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Page 3 of 4
Waterford Unit 3
During the NRC CAT inspection conducted at the Waterford Steam Electric
Station Unit 3 in February and March 1984, it was determined that the
implementation of the QC inspection program did not effectively identify
electrical raceway separation deficiencies. The inspection of Class IE
raceway installations relative to physical separation requirements had not
been accomplished in accordance with criteria established in the inspection
documents. Consequently, many of the raceway installations examined by the
NRC CAT did not conform to applicable FSAR commitments in this area. (For
details refer to Construction Appraisal Team Inspection Report
50-382/84-07.)
Seabrook
The NRC CAT inspection conducted at the Seabrook Station during May 1984
identified a number of Class 1E cable installations that, after site QC
inspection, did not maintain the specified physical separation between
redundant electrical divisions. Most of these deficiencies involve cable and
control panel wiring that had been transferred to "startup" jurisdiction.
Corrective action had not been implemented because the deficiencies had not
been properly identified. (For details refer to Construction Appraisal Team
Inspection Report 50-443/84-07.)
River Bend Unit 1
During the NRC CAT inspection conducted at the River Bend Unit 1 site in
August 1984, it was concluded that the inspection program for electrical
raceway and cable was not fully effective. Inspection of some electrical
raceway installations for physical separation had not been accomplished in
accordance with criteria established in the applicable procedures. A number
of installed electrical raceway and cable segments that did not maintain the
required separation between redundant divisions were observed by the NRC CAT
in raceway and cable that had been previously inspected by site QC
inspection personnel. (For details refer to Construction Appraisal Team
Inspection Report 50-458/84-23.)
Shearon Harris Unit 1
During the NRC CAT inspection conducted at the Shearon Harris Unit 1 site in
October 1984, the NRC CAT identified numerous installations in which the
FSAR criteria for physical separation between Non-Class 1E and Class 1E
raceway components were not met. Site inspection personnel did not identify
the above separation deficiencies because design documents used for
installation and inspection specified separation criteria that were
different from the FSAR commitment. Thus, the identified deficiencies were
the result of the licensee not meeting its FSAR commitments for appropriate
analysis of changes in separation criteria as addressed in IEEE Standard
384-74. (For details refer to Construction Appraisal Team Inspection Report
50-400/84-41.)
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Discussion:
During the NRC CAT inspections completed in 1983 and 1984, electrical
raceway and cable separation deficiencies were identified at eight sites.
The deficiencies at seven sites were attributed to inadequate site
inspection or an ineffective site inspection program in this area. At one
site the deficiency pertained to a conflict between design documents used
for installation and the FSAR commitment to conform to IEEE Standard 384-74.
In general, IEEE Standard 384-74 provides the separation criteria for Class
1E systems and components. Acceptable separation is achieved by safety class
structures, distance, or barriers, or any combination thereof. Additionally,
acceptable separation can be established by analysis as provided by IEEE
Standard 384-74.
Because separation deficiencies in Class 1E electrical systems, if
uncorrected, could adversely affect operational safety, recipients of this
notice should review the information presented to avoid similar deficiencies
at their facilities.
No specific action or written response is required by this information
notice. If you have any questions about 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 Contact: Roger Rohrbacher, IE
(301) 492-9660
Attachment: List of Recently Issued IE Information Notices
Page Last Reviewed/Updated Tuesday, March 09, 2021