IR 05000321/1985037

Insp Rept 50-321/85-37 on 851226-27.No Violations or Deviations Noted.Major Areas Inspected:Immediate Actions Taken by Licensee After Flooding of Southeast Diagonal Room of Reactor Bldg on 851221

ML20137M994
Person / Time
Site:	Hatch
Issue date:	01/15/1986
From:	Conlon T, Gibbons T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
Shared Package
ML20137M990	List: IR 05000321/1985037 ML20137M984
References
50-321-85-37, NUDOCS 8601290121
Download: ML20137M994 (4)

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UNITED STATES

[>m RiogDo NUCLEAR REGULATORY COMMISSION

[' n REGION 18 101 MARIETTA STREET, g j

• '- 2 ATLANTA, GEORGI A 30323

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Report No.: 50-321/85-37 Licensee: Georgia Power Company P. O. Box 4545 Atlanta, GA 30302 Docket No.: 50-321 License No.: DPR-57 Facility Name: Hatch Unit 1 Inspection Conducted: December 26-27, 1985 Inspector: e /.fdIhu /[/5/66 T. D. Gibbons Datd Signed Approved M / - / f-5'6 T. E. Tonlon, 3'ectio'n Chief Date Signed Engineering Branch Division of Reactor Safety SUMMARY Scope: This routine, unannounced inspection involved 13 inspector-hours on site in the areas of review of the immediate actions taken by the licensee after the flooding of the southeast diagional room of reactor buildin Results: No violations or deviations were identifie hf>0 G

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REPORT DETAILS Persons Contacted Licensee Employees

• T. Greene, Deputy General Manager

• G. A. Goode, Superintendent, Engineering

• T. A. Seitz, Manager, Maintenance

• R. D. Baker, Nuclear Licensing Manager

• P. E. Fornel, QA Site Manager NRC Resident Inspector

• P. Holmes-Ray, Senior Resident Inspector

• Attended exit interview Exit Interview The inspection scope and findings were summarized on December 27, 1985, with those persons indicated in paragraph I above. The inspector described the areas inspected and discussed in detail the inspection findings. The licensee did not identify as proprietary any of the materials provided to or reviewed by the inspector during this inspectio . Licensee Action on Previous Enforcement Matters This subject was not addressed in the inspectio . Unresolved Items Unresolved items were not identified during the inspectio . Inspector Dispatched to the Site The inspector was dispatched to Plant Hatch Unit 1 to examine the actions taken after the flooding incident on December 21, 1985. The inspector did not examine the cause of the incident as it was examined by other Region II inspectors. The inspector was to evaluate the actions taken to prevent further damage and the plans for restoration of electrical equipmen . Actions Taken After Flooding Incident The inspector examined the electrical maintenance work orders (MW0s) which were issued to take immediate action to prevent further damage. The major items which were flooded consisted of three large 4160 volt motors, seven motor operators for valves and various small motors, junction boxes and solenoid J

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a. The three large motors are listed below with the MW MPL # MWO E21-C001A Core Spray (CS) Pump Motor A 1-85-7735 E11-C002A Residual Heat Removal (RHR) 1-85-7736 Pump Motor A E11-C002C RHR Pump Motor C 1-85-7737 The procedure used is a ONE-TIME-USE-ONLY Special Instruction number 51SP-12-21-85-1-A titled "Special Instruction for Detection of Water Damage to RHR A&C and CS A Pump Motors Following Flooding of SE Diagional". This procedure has been approved by the plant manager and the plant review board. The procedure covers the cleaning, drying, and meggering of the motors. The motors are dried using a welding machine to provide full load current through the winding at a low voltage. The motor is meggered every four hours and readings recorded. The licensee has established 16 Megohms as a minimum acceptable value. The oil system has been flushed and refilled with new oil for all three motor When the motor exceeds the 16 Megohms criteria, the motor will be visually inspected. Then a MWO for restoring the motor will be issue The restoration will be completed in accordance with the manufacturer's recommendations and tested to assure that they are still acceptabl b. The limitorque operators and small motors are being evaluated by

"Special Instruction for Detection of Water Damage to Limitorque Actuator Motors Following Flooding of the SE Diagional" Procedure 51SP-12-21-85-1-8. The motors were removed to the hot machine shop and baked in ovens. The limitorque operators gear case were inspected for water in the grease and in the limit switch compartment The inspector reviewed the MW0s for the following Limitorque operators which were being dried ou The inspector also reviewed the MWO for four small motors which had not been complete ID Number MWO Equipment E21-F031A 1-85-7740 Core Spray "A" Pump Min. Flow Valve E21-C002A 1-85-7741 Core Spray Jockey Pump Motor E11-F006C 1-85-7732 RHR "C" Shutdown Cooling Suction Valve E11-F004C 1-85-7731 RHR "C" Pump Suction Valve E11-F004A 1-85-7734 RHR "A" Pump Suction Valve E11-F007A 1-85-7730 RHR "A" Min. Flow Valve

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3 l E11-F006A 1-85-7738 RHR "A" Shutdown Cooling Suction Valve E21-C002B 1-85-7746 Core Spray Jockey Pump E41-C002-2 1-85-7728 High Pressure Coolant Injection (HPCI) Vacuum Pump E41-C002-1 1-85-7727 Condensate Pump (HPCI)

c. The inspector reviewed the MW0s for the cleaning and drying of junction boxes on two levels which were being prepared for work. The following MW0s were reviewe ID Number MWO Equipment R33 1-85-7799 Junction boxes - 102' Ele R33 1-85-7800 Junction boxes - 87 ' Ele d. Instrumentation The licensee instrumentation group issued MW0s to inspect for water damage and to perform the actions necessary for preventing further damage. The licensee has identified 16 instruments with obvious damage and 20 additional instruments that will require evaluation prior to restoratio e. Summary The licensee has taken the immediate actions necessary to prevent further damage. The licensee is contacting the vendors to establish the necessary rework to correct and restore the equipment. The licensee will assure that the environmental qualifications are maintained. Testing of the restored equipment will be performed prior to return to service.