IR 05000454/1985036

Insp Rept 50-454/85-36 on 850802-0903.No Violations or Deviations Noted.Major Areas Inspected:Previous Insp findings,10CFR21 Repts,Lers,Surveillance,Maint,Operational Safety,Startup Testing & Event Followup

ML20137M006
Person / Time
Site:	Byron
Issue date:	09/09/1985
From:	Forney W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20137L992	List: IR 05000454/1985036 ML20137L986
References
50-454-85-36, NUDOCS 8509130116
Download: ML20137M006 (6)

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U. S. NUCLEAR REGULATORY COMMISSION

REGION III

Report No.: 50-454/85036(DRP)

Docket No.: 50-454 License No.: NPF-37 Licensee: Commonwealth Edison Company Post Office Box 767 Chicago, IL 60690 Facility Name: Byron Station, Unit 1 Inspection at: Byron Station, Byron, IL Inspection Conducted: August 2 - September 3, 1985 Inspectors: J. 'M. Hinds, Jr.

P. G. Brochman B. L. Hansen

Approved By: -

Reactor Projects ection 1A Date Inspection Summary Inspection on August 2 - September 3, 1985 (Report No. 50-454/85036(DRP))

Areas Inspected: Routine, unannounced safety inspection by the resident i inspectors, a headquarters inspector and a regional inspector of licensee action on previous inspection findings; 10 CFR 21 reports; LERs; surveillance; maintenance; operational safety; startup testing; event followup and other-l activitie The inspection consisted of 173 inspector-hours onsite by 4 NRC

inspectors including 39 inspector-hours during off-shif ts.

j Results: No violations or deviations were identified and no issues were l

identified which indicate potential public health and safety concerns.

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gDR ADOCM 05000454 PDR l

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DETAILS l Persons Contacted Commonwealth Edison Company

• Pleniewicz, Assistant Superintendent, Operating

• L. Sues, Assistant Superintendent, Maintenance

• Ward, Assistant Superintendent, Administrative & Support Services T. Tulon, Operating Engineer K. Weaver, Station Health Physicist

• A. Chernick, Compliance Supervisor

• St. Clair, Technical Staff Supervisor

• Britton, Quality Assurance Inspector

• J. Langan, Compliance Group Nuclear Regulatory Commission

• Forney, Chief, Projects Section IA The inspectors also contacted and interviewed other licensee and contractor personnel during the course of this inspectio * Denotes those present at the exit interview on September 3, 198 . Action on Previous Inspection Findings (92702)

(Closed) Violation (454/85016-04(DRP)): Eight examples of failure to perform surveillances when required by Technical Specifications. The inspector reviewed the licensee's response and verified procedures had been revised when required, required training had been conducted and the surveillance program had been modified as required. Based on this review licensee corrective actions were found acceptabl . 10 CFR Part 21 Reports (92716) (Closed) 10 CFR Part 21 Report (454/84009-PP): Failure of Ge:.eral Electric Ferro-Resonant transformers in Westinghouse 7.5kva inverters. The inspector reviewed the licensee's response and verified that the installed inverters had operated for greater than 6 months without a failure and that a high potential test was satisfactorily performed on spare inverters, (Closed) 10 CFR Part 21 Report (454/85002-PP): Failure of Parker-Hannafin air line check valves to seat on slow bleedoff of supply air. The inspector reviewed the licensee's response and verified that the air line check valves were replaced with stainless steel valves of improved design. The licensee has successfully surveillance tested the check valves on a bi-weekly schedule with no failures since April. The licensee will continue surveillance testing the valves on a semi-annual basis until the second refueling. Based on the satisfactory surveillance testing of the new design valves this item is considered close ~

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, Licensee Event Report-(LER) Followup (90712 & 92700) (Closed) LERs (454/85065-LL; 454/85071-LL; 454/85072-LL): An l in-office review was conducted for the following LERs to determine !

that the reporting requirements were' fulfilled, immediate corrective !

action was accomplished and corrective action to prevent recurrence had been accomplished in accordance with Technical Specification LER N Title 454/85065 Auto Start of OB VC Makeup Fan 454/85071 Main Steamline Isolation During Surveillance Testing 454/85072 Reactor Trip on High Negative Flux Rate No violations or deviations were identifie (Closed) LERs (454/85063-LL; 454/85066-LL; 454/85068-LL; 454/85070-LL; 454/85073-LL): Through direct observation, discussions with licensee personnel, and review of records the following LERs were reviewed to determine that the reporting requirements were fulfilled, immediate corrective action was accomplished and corrective action to prevent recurrence had been accomplished in accordance with Technical Specification LER N Title 454/85063 Reactor Trip Due to Turbine Trip Above P-7 .

454/85066 RX Trip on Load Rejection -

454/85068 Reactor Trip on High Negative Flux Rate 454/85070 Failure of IB RHR Pump Due to High Vibration 454/85073 Feedwater Isolation During Plant Startup The events described in LERs 454/85063, 454/85066, 454/85068, were reviewed in Inspection Report (454/85030(DRP)).

No violations or deviations were identifie . Monthly Surveillance Observation (61725)

The inspector observed technical specifications required surveillance testing on the Gas Decay Tank Radiation Monitor, 4.6KV Bus Undervoltage Relays, Essential' Service Water Valves and verified that testing was performed in accordance with adequate procedures, that test

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instrumentation was calibrated, that limiting conditions for operation sere met, that removal and restoration of the affected components were accomplished, that test results conformed with technical specifications and procedure requirements and were reviewed by personnel other than the individual directing the test, and that any deficiencies identified during the testing were properly reviewed and resolved by appropriate management personne No violations or deviations were identifie . Monthly Maintenance Observation (62703)

Station maintenance activities of safety related systems and components listed below were observed / reviewed to ascertain that they were conducted in accordance with approved procedures, regulatory guides and industry codes or standards and in conformance with technical specifications.

, The following items were considered during this review: the limiting conditions for operation were met while components or systems were removed from service; approvals were obtained prior to initiating the work; activities were accomplished using approved procedures and were inspected as applicable; functional testing and/or calibrations were performed prior to returning components or systems to service; quality control records were maintained; activities were accomplished by qualified personnel; parts and materials used were properly certified; radiological controls were implemented; and, fire prevention controls were implemented. Work requests were reviewed to determine status of outstanding jobs and to assure chat priority is assigned to safety related equipment maintenance which may affect system performanc The following maintenance activities were observed / reviewed:

Replacement of Control Switch for Valve ICV 110B Repair of Waste Gas Compressor 0GW-01SE Repair of Containment Spray Pipe ICS36AA Following completion of maintenance on the Control Switch foi Valve 1CV1108, Waste Gas Compressor OGW-01SE, and Containment Spray Pipe ICS36AA, the inspector verified that these systems had been returned to service properl No violations or deviations were identifie . Operational Safety Verification and Engineered Safety Features System Walkdown (71707 & 71710)

The inspectors observed control room operation, reviewed applicable logs and conducted discussions with control room operators during the month of August. During these discussions and observations, the inspectors ascertained that the operators were alert, cognizant of plant conditions, attentive to changes in those conditions, and took prompt action when appropriate. The inspectors verified the operability of selected ;

emergency systems, reviewed tagout records and verified proper return to :

service of affected components. Tours of the auxiliary, turbine and

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rad-waste buildings were conducted to observe plant equipment conditions, including potential fire hazards, fluid leaks and excessive vibration and to verify that maintenance requests had been initiated for equipment in need of maintenanc The inspectors by observation and direct interviews verified that the physicel security plan was being implemented in accordance with the station security pla The inspectors observed plant housekeeping / cleanliness conditions and verified implementation of radiation protection controls. During the month of August, the inspectors walked down the accessible portions of the Auxiliary Feed and Essential Service Water systems to verify operability. The inspectors also witnessed portions of the radioactive waste system controls associated with rad-waste shipments and barrelin These reviews and observations were conducted to verify that facility operations were in accordance with the requirements established under Technical Specifications, 10 CFR and administrative procedure No violations or deviations were identifie . Startup Test Witnessing and Observation (72302)

The inspectors witnessed performance of portions of the following startup test procedures in order to verify that testing was conducted in accordance with the operating license and procedural requirements, test data was properly recorded and performance of licensee personnel conducting the tests demonstrated an understanding of assigned duties and responsibilitie .64.39 Large Load Reduction 7.51.45 Steam Generator Moisture Carryover Test No violations or deviations were identifie . Onsite Followup of Events at Operating Reactors (93702) General The inspector performed onsite followup activities for an event which occurred on August 7, 1985. This followup included reviews of

, operating logs, procedures, Deviation Reports, Licensee Event l Reports (where available) and interviews with licensee personne For this event, the inspector developed a chronology, reviewed the functioning of safety systems required by plant conditions, reviewed licensee actions to verify consistency with procedures, license conditions and the nature of the event. Additionally the inspector verified that licensee investigation had identified root causes of equipment malfunctions and/or personnel error and had taken appropriate corrective actions prior to plant restart. Details of this event and licensee corrective actions developed through inspector followup are provided in Paragraph b below, i

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. Reactor Trip on Negative Rate Flux High on August 7, 1985 While in Mode 1, with reactor power at 98%, the reactor tripped on Power Range Flux Negative Rate High. A Control Systems Technician (CST) was performing an alignment on Nuclear Instrumentation (NI)

Power Range Channel N41 Delta-I circuity per Byron Instrument Surveillance BIS 3.1.1-214, " Surveillance Calibration for the Nuclear Instrumentation System Power Range N41 - N44". The CST placed N41 in test and tripped its bistables. The BIS then required

! the detector signal cables to be disconnected. The CST went to the

, rear of the NI racks and opened the door for N42 and disconnected its detector cables. The loss of detector signal caused the N42 i

- High Negative Rate Bistable to trip and with the N41 bistable already tripped the 2/4 coincidence was met and a reactor trip occurre The licensee's investigation determined that even though the plug numbers are the same for each power range detection there was adequate identification on the rear doors of the NI racks to identify the power range insid The licensee's corrective action included disciplinary action against the CST, changing the locks on the NI racks and other protective instrumentation so that each cabinet has a unique lock, changing the instrument surveillance procedures for Reactor Protection on Engineered Safeguards systems to use a unique cable *

identification number rather than a NSSS supplied number which may be generic to a set of instruments. Final review and closure of ,

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this event will'be accomplished during the review of the LER in a subsequent repor No violatinns or deviations were identifie . Exit Interview (30703)

The inspector met with licensee representatives denoted in Paragraph 1 at the conclusion of the inspection on September 3, 1985. The inspector summarized the purpose and scope of the inspection and the findings. The inspector also discussed the likely informational content of the inspection report with regard to documents or. processes reviewed by the inspectors during the inspection. The licensee did not identify any such documents / processes;as proprietar ,

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