IR 05000309/1979017
| ML19294B371 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 01/07/1980 |
| From: | Lazarus W, Martin J, Tanya Smith NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML19294B365 | List: |
| References | |
| 50-309-79-17, NUDOCS 8002280252 | |
| Download: ML19294B371 (9) | |
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U. S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION I
Report No.
50-309/79-17 Docket No.
50-309 License No.
DPR-36 Priority Category C
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Licensee:
Maine Yankee Atomic Power Company 20 Turnpike Road Westborouch, Massachusetts 01581 Facility Name:
Maine Yankee Atomic Power Station Inspection At:
Wiscasset, Maine Inspection Conduct December 3-7, 1979
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Inspectors:
Am
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Mr.'
azarus, i tor Insp ctor date sf Jen I
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Mr. T. Smith, edctof Inspectoy date
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date Approved by:
A
/ "7 8D Mr.' T. Martin hief, deactof Pu6fects
- date Section No.
, RO&NS Branch Insoection Summary:
Insoection on December 3-7, 1979 (50-309/79-17)
Areas Inspected:
Routine unannounced inspection by regional based inspectors of:
plant operations including a review of shift logs and records, a tour of accessible areas, and observation of plant activites; licensee actions concerning selected previous inspection findings and IE Bulletins and Circulars; required licensee periodic reports; and followup on selected Licensee Event Reports (LER's).
The inspection involved 37 inspector-hours on site by two NRC inspectors.
Results:
No items of noncompliance were identified.
8002280
'I Region I Form 12 (Rev. April 1977)
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DETAILS 1.
Persons Contacted
- P. Anderson, Staff Assistant to the Plant Manager R. Arsenault, Assistant Operations Department Head J. Brinkler, Reactor and Computer Engineering Department Head
- C. Frizzle, Assistant Plant Manager J. Hebert, Technical Assistant R. Painter, Maintenance Foreman R. Radasch, I and C Department Head
- E. Wood, Plant Manager R. Wyckoff, Technical Assistant The inspector also interviewed several licensed operations personnel and members of the licensee's technical and administrative staffs.
- Denotes those present at the exit interview.
2.
License Action on Previous Inspection Findings (Closed) Followup Item (309/77-17-27):
During a review of the Yellow Tag Log the inspector verified that safety-relateo yellow tags which had been used to reflect permanent modifications had been cleared.
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(Closed) Unresolved Item (309/78-08-02):
The inspectors reviewed the licensee's investigation and analysis of the cracked groet base of the pipe support at the suction of Auxiliary Feed Pump P25c.
The analysis demon-strated that the grout material is not load bearing, and that the cracking was not due to an overstress condition.
(Closed) Unresolved Item (309/78-08/03):
The licensee contacted its snub-ber supplier concerning the misalignment of snuober WFPD-HSS-203.
It was determined that a misalignment of 10 degrees is permissible.
This item is resolved.
3.
Shift.[ogs and Operating Records a.
The inspector reviewed selected shift logs and operating records to verify that:
Control Room log entries involving abnormal conditions provide
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sufficient detail to communicate equipment status, lockout status, correction, and restoration; Log Book reviews are being conducted by the staff;
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Operating orders do not conflict with Technical Specifications
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requirements;
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Jumper (Bypass) log does not contain bypassing discrepancies
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with Technical Specification requirements and that jumpers are properly approved and installed.
b.
The following plant logs and operating records were reviewed.
Control Room Operators' Log for October 14-December 6, 1979
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Local Control Rules (White Tags), effective tags serial nos.
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1881-4161 Operation Safeguard, Yellow Tag-Control Log, effective control
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sheets through 79-34
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Plant Operations Review Committee Minutes 79-13 through 79-33 Shift Information Book
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Primary Radiochemistry Logs, October 1-December 4, 1979
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Operating Memos, all effective as of December 6, 1979
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Except as noted in c. below, no inadequacies were identified.
The inspector noted that Shift Information Book memo 1.19.6, "Sta-c.
tioning of Special Operator at AFW Controls", only required that two operators be present in the Control Room.
The inspector discussed this with the licensee and indicated that NRR had intended for the designated Auxiliary Feedwater (AFW) Operator to be immediately at the controls for transients which could require AFW initiation.
The licensee agreed with this clarification and revised the memo to require the designated operator to obtain a qualified re-f prior to engaging in any activities in the Control Room which would make him unavailable for immediate response at the AFW panel.
The inspec-tor had no further questions in this area.
4.
Plant Tour The inspector conducted a tour of accessible areas of the plant lncluding the Primary Auxiliary Building, Ventilation Equipment Room, Spray Building, Auxiliary Feed Pump area, Turbine Building, Switchgear Room, Battery Rooms, HP Control Point, Diesel Generator Rooms, and the Control Room.
Norssi plant operation was in progress at 80-90 percent power.
Details are noted belo _.._.. __. _ _
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a.
Monitoring Instrumentation and Annunciators Control Board annunciators were checked for alarms, abnormal for plant conditions, on several occasions during the inspection.
The following monitoring instrumentation was checked to verify that required instru-mentation was operable and that, where applicable, values indicated were in accordance with Technical Specifications.
Annunciator:
DG-1A Bypassed
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The inspector was informed that because of che GM diesei turbo-charger lubrication problem, (potential inaaequate lubrication to the turbocharger bearings if a fast start occurs between 15 minutes and 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> following a hot run) that the emercency diesel generator's auto start function was bypassed for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> aftar the
' i diesel's monthly surveillance test.
Since the diesels are tested on a staggered basis (one each two weeks) one diesel remained available for auto start.
The inspector expressed concern that since the identified lubrication problem would only cause damage after several fast starts of this type, that it was imprudent to intentionally disable the diesel generator from an automatic fast start which would occur upon loss of offsite power.
The licensee agreed to return each diesel to service immediately after testing, and only prohibit routine, intentional fast starts during the 15 minute-3 hour cooldown period.
The inspector will follow up in this area in accordance with IE Circular 79-12, when repair kits become available from G.M.
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Monitoring Instrumentation-Safety In ection Tank Levels and Pressures-Refueling Water Storage Tank Level-Containment Pressure-CEA Positions-RMS Process and Area Monitors-RCS Temperature and Pressure-NI Power t.evel-Symeteric Offset All readings were within normal acceptable bands.
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b.
Radiation Controls Radiation Control established by the licensee including posting / locking of radiation areas and high radiation areas, the condition of step-off pads, and the disposal of protective clothing were observed for com-pliance with Technical Specifications, 10 CFR 20, and the Maine Yankee Radiation Protection Manual.
No items of noncompliance were identified.
c.
Plant Housekeeping and Fire Protection Plant housekeeping conditions, including general cleanliness and stor-age of material to prevent fire hazards, were observed in all areas toured for conformance with the Maine Yankee Plant Safety Manual.
The inspector noted that general plant housekeeping conditions were good.
Cardox tank pressure and level was verified to be normal and the main transformer deluge system was set for automatic actuation.
d.
Fluid Leaks and Piping Vibrations Systems and equipment in all areas toured were observed for the existence of fluid leaks and abnormal piping vibrations.
None were identified.
e.
Control Room Manning / Shift Turnover Control Room manning was reviewed for conformance with the requirements of 10 CFR 50.54(k) and Technical Specifications.
The inspector observed that appropriate licensed operators were on shift as specified by the posted shift schedule on several occasions during the inspection, and manning requirements were met at all times.
Several shift turnovers were observed during the course of the inspection.
All were noted to be thorough and orderly.
f.
Battery Room Ventilation The inspector verified that battery ventilation was operable.
5.
In-Office Review of Licensee Event Reports (LER's)
The inspector reviewed LER's received in RI office to verify that details of the event were clearly reported including the accuracy of the descrip-tion of cause and adequacy of corrective action.
The inspector also determined whether further information was required from the licensee, whether generic implications were indicated, and whether the event war-ranted on site followup.
The following LER's were reviewed.
79-15/3L, RPS Failed 15VOC Power Supply
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79-16/3L, AT Power Amplifier Failed
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79-17/99X, RCS I-131 Greater than 1.0 pCi/gm
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79-18/1T, Steam Generator Heat Sink Unavailable 79-19/3L, Procedure Temporary Change Not Reviewed as Required
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79-20/3L, Waste Liquid Rad Monitor Out of Service
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79-21/3L, "B" Containment Spray Pump Out of Service
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79-22/3!., RPS Matrix Trip Relay Failure
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79-23/3L, Containment Spray Pump Breaker Malfunction
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79-24/99X, RCS I-131 Greater Than 2.0 pCi/gm
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79-25/3L, Service Water Famp Breaker Malfunction
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79-26/36, Diesel Turbocharger Fire
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79-28/3, RPS Matrix Relay Failure Except for those LER's denoted by (*), which were selected for on site followup, the inspector had in further questions in this area.
6.
On Site Licensee Event.Followuo For those LER's selected for on site followup, the inspector verified that reporting requirements of Technical Specifications and Regulatory Guide 1.16 had been met, that appropriate corrective action had been taken, that the event was reviewed by the licensee as required, and that continued operation of the facility was conducted within Technical Specification limits.
The review included discussions with licensee personnel, review of PORC meeting minutes, Plant Information Reports (in-house reports), and applicable logs.
The following LER's were reviewed on site.
79-18/1T Steam Generator Heat Sink Unavailable
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The inspector reviewed procedure 1-1, " Plant Heatup", Rev. 10, and 1-13-2, "RHR System Shutdown", Rev. 6, which require one steam gene-rator at 66% level prior to securing RHR during plant heatup.
The inspector also verified, by discussion with three plant operators, that they were aware of the event and had received additional train-ing to emphasize this requirement.
The inspector had no further ques-tions in this area.
79-22/3L and 79-28/3C, RPS Matrix Relay Failures
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This has been a repetitive occurrence since March 1977.
The licensee has ordered dry contact relays for a replacement based on experience at another facility.
Due to a long lead time from the supplier, the replacements won' t be available until late summer 1980.
In the inte-rim the licensee is imposing increased surveillance of the installed relays, starting with one week interval and then extending the interval of failures are not noted.
The procedure establishing this program b'd not been instituted by the time this inspection was completed, so this will be reviewed in a subsequent inspection (309/79-17-01).
79-23/36, Containment Spray Pump Breaker Malfunction
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This failure was identified when preparing to switch standby contain-ment spray pumps.
OPMEMO 9-D-1 of 3/1/79 requires test running the pumps that have been shifted to or from standby for fifteen minutes.
This test identified the problem before the pump was placed in service for auto-start.
The inspector had no further questions in this area.
79-25/3L Service Water Pump Breaker Malfunction
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In a review of maintenance records to determine the last time that maintenance or testing had been performed on this circuit breaker, the inspector noted that testing of all GE AK-2 breakers had com-menced on 10/4/79 in accordance with MR-1341 and procedure MYM-5-144.
Part of this testing required tripping of the breaker internally by
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use of the trip shaft and resetting upon completion of the testing.
Since this test was performed on the affected breaker the day before the malfunction and no problem was apparent after the breaker was reset, the inspector questioned whether the maintenance electrician may not have failed to reset the breaker.
The electrician acknowledged that this was more probable as the cause than just a random failure, but could not verify from memory whether or not he had reset the breaker.
Since the failure could not be repeated in subsequent testing, the inspector had no further questions in this area.
7.
Followuo on IE Circulars The inspector verified that the selected circulars had been received on site, reviewed by cognizant personnel, and adequate corrective action taken if necessary.
No inadequacies were identified.
79-04, Loose Locking Nut on Limitorque Valve Operations
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79-08, Attempted Extortion-Low Enriched Uranium
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79-09, Regulator Diaphragm Failures in Self Contained Breathing
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Apparatus (SCBA)
79-10, Pipefittings Manufactured from Unacceptable Material
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79-12, Potential Diesel Generator Turbocharger Problem (followup remains open, see de', ail 4.a.)
79-13, Replacement of Diesel Fuel Pump Starting Contactors
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79-15, High Pressure Hose Failures in SCBA's
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79-17, Contact Problem in 58-12 Switches
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79-18, Proper Installation of Target Rock Safety Valves
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79-19, Loose Locking Devices on Ingersoll-Rand Punps 79-20, Failure of GTC-Sylvania Relay
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79-23, Motor Starters and Contactors Failed to Operate
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8.
Followup on Selected IE Bulletins The inspector verified that the Bulletin had been received and reviewed by cognizant personnel, that the required response had been returned as required, and that adequate corrective action had been taken if required.
79-09, Failures of G.E. AK-2 Circuit Breakers
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The inspector reviewed documentation associated with MR-1341 and Pro-cedure MYH-5-144, " Inspection and Repair of GE AK-2 Circuit Breakers as coni.itted in the licensees' response (MY letter 79-54 of 5/21/79).
No inadequacies were identified.
79-15, Deep Draft Pump Problems
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The inspector reviewed the machinery history cards (MYM-M-1-72) for the Service Water Pumps and Low Pressure Safety, Injection Pumps, to verify that information in the response letter (MY 79-92 of 9/11/79 was correct.
No inadequacies were identified.
79-24, Frozen Lines
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Due to extensive heat tracing in anticipation of cold weather, frozen lines have not been a problem at Maine Yankee.
The inspector had no further questions concerning the licensee's evaluation as noted in the response (MY 79-122 of 10/31/79).
9.
In Office Review of Periodic Reports The inspector reviewed the following reports received in the RI Office to verify that reporting requirements were me,
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1978 Annual Operating Report
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Monthly Operating Reports for January-October 1979.
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No inadequacies were identified.
10.
Exit Interview The inspector met with licensee representatives (see detail 1 for attendees)
at the conclusion of the inspection to discuss the scope and findings of the inspection as detailed in this report.