Part 21 Report - 1996-521

ACCESSION #: 9610080102 NOTE: This text document was processed from a scanned version or an electronic submittal and has been processed as received. Some tables, figures, strikeouts, redlines, and enclosures may not have been included with this submittal, or have been omitted due to ASCII text conversion limitations. In order to view this document in its entirety, you may wish to use the NUDOCS microfiche in addition to the electronic text. 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. *** END OF DOCUMENT ***

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