Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
ACCESSION #: 9610080102
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GENERAL INFORMATION or OTHER EVENT NUMBER: 31093
LICENSEE: LASALLE COUNTY STATION NOTIFICATION DATE: 10/04/96
CITY: REGION: 3 NOTIFICATION TIME: 15:35 [ET]
COUNTY: STATE: IL EVENT DATE: 09/28/96
LICENSE#: AGREEMENT: Y EVENT TIME: 12:00[CDT]
DOCKET: LAST UPDATE DATE: 10/04/96
NOTIFICATIONS
NRC NOTIFIED BY: MR. SUBALUSKY
HQ OPS OFFICER: DOUG WEAVER VERN HODGE NRR
EMERGENCY CLASS: NOT APPLICABLE
10 CFR SECTION:
[Illegible] CCC 21.21 UNSPECIFIED PARAGRAPH
EVENT TEXT
PART 21 NOTIFICATION ON WKM MODEL 70-13 PNEUMATIC ACTUATORS
ANCHOR DARLING VALVE COMPANY PERFORMED EFFECTIVE DIAPHRAGM AREA
(EDA)
TESTING ON THE VARIOUS WKM MODEL 70-13 PNEUMATIC ACTUATORS (SIZES 35,
70,
140, 280). THE PRELIMINARY TEST RESULTS INDICATED THAT THE ORIGINAL
EFFECTIVE DIAPHRAGM AREA VALUES USED TO CALCULATE THE BENCH SET
AND
SUPPLY AIR SET POINTS WERE INCORRECT. THESE ACTUATORS ARE USED ON
VARIOUS PRIMARY CONTAINMENT ISOLATION VALVES AND THESE VALVES
MAY NOT
PROVIDE ADEQUATE SYSTEM ISOLATION UNDER DESIGN ACCIDENT
CONDITIONS.
LASALLE UNIT ONE IS IN COLD SHUTDOWN AND UNIT TWO IS IN THE REFUEL
MODE.
FAX Date 10/04/96
Number of pages including cover sheet 7
TO: Nuclear Regulatory FROM: W. T. Subalusky
Commission Site Vice-President
OPS Center LaSalle County Station
Phone 815-357-6761
Fax Phone 815-357-6761, ext. 2502
Fax Phone 301-816-5151
Verification 301-816-5100
RE: LaSalle County Station
Units 1 and 2
10CFR Part 21
Notification 9605
REMARKS: [x] Urgent [] For your review [] Reply ASAP [] Please Comment
Attached are the above-entitled documents including one (1) cover
letter;
one (1) Memorandum, and Notification.
LaSalle Generating Station
2601 North 21st Road
Marseilles, Illinois 61341-9757
Tel 815 357-6761
ComEd
October 4, 1996
United States Nuclear Regulatory Commission
Attention: Document Control Desk
Washington, D.C. 20555
Subject: LaSalle County Station Units 1 and 2
10CFR Part 21 Notification 9605
NRC Docket Numbers 50-373 and 50-374
Enclosed is ComEd's 10CFR Part 21 Notification of the deficiency of WKM
model 70-13 Pneumatic Actuators manufactured by the Anchor Darling Valve
Company and in use at LaSalle County Station. This notification is
submitted in accordance with the requirements of 10CFR 21, Section
21.1(b), 21.3a(3), and 21.3d(4).
It there are any questions or comments concerning this letter, please
refer them to me at (815) 357-6761, extension 3600.
Respectfully,
W. T. Subalusky
Site Vice President,
LaSalle County Station
Enclosure
cc: A. B. Beach, NRC Region III Administrator
M. P. Huber, NRC Senior Resident Inspector - LaSalle
D. M. Skay, Project Manager - NRR - LaSalle
F. Niziolek, Office of Nuclear Facility Safety - IDNS
DCD - Licensing (Hardcopy: Electronic: )
Central File
A Unicom Company
Memorandum
ComEd
Date: October 3, 1996
To: Nuclear Licensing
From:
Charles J. Bohan Date
SEC Engineer
Baron S. Westphal Date
SEC Pump & Valve Supervisor
Petros Antonopoulos Date
SEC Manager
Subject: Part 21 Notification 96-05 WKM, model 70-13 Pneumatic
Actuators-Incorrect Effective Diaphragm Area
LaSalle Site Support Engineering has evaluated the subject document and
determined that the defect/noncompliance is reportable under the
requirements of 10CFR Part 21. The attached report has been prepared
for
submittal to the NRC, and should be submitted by October 4, 1996, to the
NRC Operations Center.
Questions regarding this report should be directed to Mark Smith, ext.
2323.
Enclosure
cc: President and Chief Operating Officer
Senior Vice President, Nuclear Operations
Chief Nuclear Operating Officer
Vice President Nuclear Engineering
Nuclear Station Managers
Site Engineering Manager
Part 21 Committee
Licensing Operations Director
A Unicom Company
10CFR Part 21 Notification
10 CFR Part 21 Interim Report (File 96-05)
WKM, MODEL 70-13 PNEUMATIC ACTUATORS -
INCORRECT EFFECTIVE DIAPHRAGM AREA
Applicability This notification is submitted in accordance with the
requirements of 10CFR Part 21, Section 21.1 (b), 21.3a(3), and 21.3d(4).
This is an interim report, a final report or update will be provided
within sixty days.
Identification LaSalle County Station, Units One and Two
of Facility and Commonwealth Edison
Component Chicago, Illinois
WKM, Model 70-13 pneumatic actuators (sizes 35, 70,
140, 280)
Identification Anchor Darling Valve Company
of Component
Manufacturer
Nature of Defect
Anchor Darling Valve Company performed effective diaphragm area (EDA)
testing on the various WKM. Model 70-13 pneumatic actuators (sizes 35,
70, 140, 280). The preliminary test results indicated that the original
effective diaphragm area values used to calculate the bench set and
supply air set points were incorrect.
Safety Significance
Potentially, the listed Primary Containment Isolation System (PCIS)
valve
assemblies would not provide adequate system isolation under designed
accident conditions. The PCIS function may not have operated if
required.
LaSalle Unit One is in Cold Shutdown mode and Unit Two is in Refuel
mode.
The PCIS function for the listed valves is not required for these modes.
Time of Discovery
September 28, 1996
Corrective Actions
1) All affected valves are being reviewed/evaluated, design changes are
being initiated as required.
It should be noted that the WKM Series 70-13 actuator is currently
manufactured by the Anchor Darling Valve Company and similar valves may
have been previously manufactured under the "Muesco" or "B, S & B"
designations.
2) LaSalle is awaiting the publication of Anchor Darling's final testing
reports. A final notification will be made at that time.
Table "10 CFR Part 21 Interim Report (File 96-05) Number and Location of
All Defective Components", 3 pages, omitted.
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