ML20235H110
| ML20235H110 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/13/1986 |
| From: | NIAGARA MOHAWK POWER CORP. |
| To: | Linville J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| Shared Package | |
| ML20235G041 | List: |
| References | |
| FOIA-87-438 NUDOCS 8709300380 | |
| Download: ML20235H110 (3) | |
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DATE: 11-13-86 TO:
Jim Linville, Chief, Section 2C, DRP FROMe NMP Resident Office WEEKLY STATUS REPORT - NINE MILE POINT 2 1.
Plant Status:
As of 11:00 AM, November 13, the licensee had loaded 685 fuel I
bundles, but fuel loading was stopped due to a kink in the hoist cable.
Fuel loading will resume after replacement of the cable, which is anticipated to take approximately 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
In addition to the routine resident inspector coverage, the resident inspectors from Ginna Station were onsite this week to observe fuel loading activities.
2.
MSIV Status:
The 6D MSIV refurbished ball was returned to the site and installed 11/12.
The official Type C leakage test will be performed Later today,11/13, af ter the actuator has been installed and the valve stroked once. The MSIV failed the informational Type C leak test performed immediately after the bonnet installation.
The remaining three MSIV balls are scheduled to arrive at the site on or before 11/21.
Work has proceeded with modifications to the HSIV actuators, but has been slowed due to secondary containment integrity requirements imposed by the fuel load activities. The remainder of the modifications will be performed after core alterations have been completed.
November 24 is still the target completion date for MSIV modifications.
3.
Violation of Technical Specifications:
On November 7, 1986, while performing Source Range Monitor (SRM) functional checks, SRM C was bypassed to perform the check but was not returned to service for several hours. This resulted in all trip functions of SRM C being inoperative while 19 fuel bundles were loaded into the quadrant containing SRM C.
This is contrary to Technical Specification (TS) 3.9.2.
The licensee discovered SRM C bypassed during the control board walkdown prior to shift turnover and immediately halted fuel loading.
An Enforcement Conference is planned (date not yet determined) for this violation and other recent fuel load related TS violations.
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4.
Reportable Events:
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On November 9, two reactor scrams occurred due to high flux trips on Average Power Range Monitor (APRM) Channel C.
The first scram occurred at 4:40 AM and was initially thought to be caused by an
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electrical spike due to welding in close proximity to a Local Power Range Monitor (LPRM) cable.
Several other APRM C upscale trips occurred, until the channel was bypassed and the scram
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- reset at 5:45 AM.
At 6:30 AM, APRM C was unbypassed, and another spike caused the second scram at 6:37 AM.
No welding was in progress at the time.
Further investigation found a faulty circuit card in LPRM 48-33.
The card was replaced, and no further spiking was observed.
ENS calls were made for both events.
On November 8, the Reactor Building Above Refuel Floor Exhaust
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Radiation Monitor, 2ifVR-RU14A, was removed from service to j
troubleshoot a low sample flow problem, and the monitor was not declared inoperable. The four effluent radiation monitors associated with this system are required by Technical Specification 3.3.2 and Table 3.3.2.1 to be operable during core alterations. The licensee later determined that the TS was violated and reported the apparent TS violation via ENS on 11/9.
f Further review by the licensee is in progress to determine if the applicable TS sections are appropriate for the system configuration and response logic.
At 3:52 AM, 11/10, another low flow alarm was received on radiation monitor 2HVR-RU14A. The licensee declared the channel inoper.able, secured Reactor Building Normal Ventilation and started both trains of the Standby Gas Treatment System (SGTS).
, Core alterations were suspended until the SGTS was operating.
This event was reported via ENS on 11/10.
5, Equipment Problems:
Aside from the hoist cable problem previously mentioned, the licensee has identified a few other minor refuel bridge problems.
The hoist drive motor power supply breaker was frequently tripping on overcurrent.
It was determined that the overcurrent relays were set too low and were readjusted to a higher setting as recommended by GE.
In addition, vertically mounted, bridge drive motor relays were periodically vibrating loose and causing bridge fault lockouts. These relays are now checked every shift to ensure proper engagement.
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Planned Activitias:
l Upon completion of fuel load, tentatively scheduled for 11/14, the licensee will conduct a video taped core load verification. A shutdown margin test and control rod drive system testing will then complete the open vessel portion of the Start-up Test Program.
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7.
Control Room Atmosphere The licensee has taken some steps to reduce the noise level and congestion in the Control Room.
The Shift Work Group Coordinator has been moved to a desk outside the Control Room. All construction and start-up related Work Requests and the associated equipment mark-ups are processed through this individual.
This action has reduced much of the unnecessary traffic in the Control Room. Also, the resident inspectors have c
observed the SSS and CSO exercising their authority to remove unnecessary personnel from the Control Room. The resident inspectors will continue to closely monitor licensee progress in this area.
8.
Cumulative Summary of Significant Events 10/31 - License issued 11/2 - Fuel loading begun 11/5 - IRM reactor trip followed by SDV level reactor trip (ENS) 11/6 - Vital area breached without compensatory measures (ENS) 11/7
- Fuel loading with bypassed SRM (LCO violation) 11/8 - Inoperablo RB exhaust rad monitor (LCO violation) 11/9 - Two APRM reactor trips due to faulty circuit card (ENS) 11/10 - Inoperable RB exhaust rad monitor (ENS) 6
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cc: Murley Allan Kane Collins Ebneter Martin Eselgroth Cook Meyer P.
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