IEB 79-01b Supplement 3 Environmental Qualification of Class 1E Equipment (Generic Letter 80-89)
October 24, 1980
MEMORANDUM FOR: B. H. Grier, Director, Region I
J. P. O'Reilly, Director, Region II
J. G. Keppler, Director, Region III
K. V. Seyfrit, Director, Region IV
R. H. Engelken, Director, Region V
FROM: Norman C. Mosely, Director, Division of Reactor
Operations Inspection, IE
SUBJECT: IE SUPPLEMENT NO. 3 TO BULLETIN 79-01B: ENVIRONMENTAL
QUALIFICATION OF CLASS 1E EQUIPMENT
The subject supplement should be dispatched for action on October 24, 1980
to all power reactor facilities with an Operating License. The supplement
should be dispatched for information to the SEP plants (including Indian
Point 2 and 3 and Zion 1 and 2) the NTOL plants and plants with a
construction permit. The supplement will also be transmitted from
Headquarters to participants in the July Region meeetings.
The purpose of this supplement is to clarify issues raised by Supplement
No. 2. No inspection requirements were added as a result of this
Norman C. Mosely, Director
Division of Reactor Operations
Office of Inspection and Enforcement
1. Draft Transmittal Letters
2. IE Supplement No. 3 to Bulletin
CONTACT: V. D. Thomas, IE
(Draft letter to all power reactor facilities with an operating license less
SEP, Indian Point, and Zion)
IE Supplement No. 3 to Bulletin No. 79-01B: ENVIRONMENTAL QUALIFICATION OF
CLASS 1E EQUIPMENT
Enclosed is IE Supplement No. 3 to Bulletin No. 79-01B. This supplement
clarifies two issues raised by Supplement No. 2. These are (1) the
submittal of qualification information for equipment resulting from TMI
Action Plan requirements and (2) the qualification of equipment which is
required to achieve a cold shutdown condition. This action is the result of
industry feedback to NRC regarding interpretation of Supplement No. 2. The
information presented is applicable to your submittal regarding
environmental qualification of Class 1E equipment which is required by
November 1, 1980.
Should you have questions regarding this Supplement please contact this
1. IE Supplement No. 3 to
Bulletin No. 79-01B
2. Recently Issued IE Bulletins
SSINS No.: 6820
IEB Sup #3 to 79-01B
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
WASHINGTON, D.C. 20555
October 24, 1980
IE Bulletin No. 79-01B Supplement No. 3: ENVIRONMENTAL QUALIFICATION OF
CLASS IE EQUIPMENT
Description of Circumstances:
Two issues were raised by Supplement No. 2 which require clarification.
These are: (1) the dates required for submittal of qualification
information for TMI related equipment, and (2) whether the equipment
required to achieve a Cold Shutdown condition must be environmentally
qualified if the licensing basis for the plant was a Hot Safe Shutdown
(1) Supplement No. 2 (Q.1, Q.5) addressed the minimum cold shutdown
requirements. The staff position on this issue is that the licensee
must identify and environmentally qualify the equipment needed to
complete one method (path) of achieving and maintaining a cold shutdown
condition. The equipment of other paths must be reviewed to assure
that its failure will not aggravate or contribute to the accident (ref.
Q.5 Supp. No. 2).
Due to an inconsistency between Supplement No. 1 and Supplement No. 2,
the staff position on this issue was unclear. Therefore, the following
a. The qualification information for equipment needed to achieve and
maintain a Hot Safe Shutdown condition must be submitted no later
than November 1, 1980.
b. The qualification information for equipment required to achieve and
maintain a Cold Shutdown condition (ref. Q.1 and Q.5 of Supplement
No.2) must be submitted not later than February 1, 1981.
(2) IEB 79-01B required a 90 day response which was due in mid-April 1980.
Supplement 1 (Feb. 1980) informed licensees that equipment which was
"planned" to be installed as a result of lessons learned need not be
addressed in that response. Some of this equipment has since been
installed. Supplement No. 2 (Q.5, Q.21) identified that the staff
position was that equipment which is installed should be treated in a
manner similar to all other safety-related electrical equipment and be
addressed in the November 1, 1980 submittal. This position represents
no change in staff position regarding the scope of the review.
However, since the staff position on this issue was unclear the
following will apply:
IEB 79-01B Sup #3
October 24, 1980
Page 2 of 2
a. Qualification information for installed TMI Action Plan equipment
must be submitted by February 1, 1981.
b. Qualification information for future TMI Action Plan equipment (ref.
NUREG-0737, when issued), which requires NRC pre-implementation
review, must be submitted with the pre-implementation review data.
c. Qualification information for TMI Action Plan equipment currently
under the NRC review should be submitted as soon as possible.
d. Qualification information for TMI Action Plan equipment not yet
installed which does not require pre-implementation review should be
submitted to NRC for review by the implementation date.
The above items 1 and 2 represent no change in staff position regarding the
scope of the 79-01B Supplement 2 review.
IE Bulletin No. 79-01B was issued under a blanket GAO clearance (B180225
(R0072), clearance expired July 31, 1980) specifically for identified
generic problems. Supplement No. 3 to Bulletin 79-01B is for information,
hence no GAO clearance is required.
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