ML20235H139
| ML20235H139 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 12/05/1986 |
| 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 8709300388 | |
| Download: ML20235H139 (3) | |
Text
.
ao-i
.. A O '
s{
l December 5, 1986 TO:
LJim Linville, Chief, Section 2C, DRP FROM: NMP Resident Office / Project Engineer I
WEEKLY STATUS' REPORT //5 - NINE MILE POINT 2 1.
Plant Status:
The' balls for all MSIVs have been installed and leak tested acceptably. The modifications to the MSIV actuators continue.
The reactor vessel has been reassembled, and preparations are underway for the hydrotest. The MSIV valve work remains the critical path for initial criticality.
J The inspectica coverage was provided by the resident inspectors and was supplemented by Ha3 Gregg on MSIV work and Hank Bicehouse j
on radiological chemistry.
2.
MSIV Status:
1' On 11/30 NMP-2 completed the installation of the MSIV balls and successfully leak tested them. The last four balls were installed with a different seat packing, which seemed to permit i
higher leakage rates. The leak tests for the last four MSIVs fell in the 4:- 6 scfm range, as opposed to the'less than 2 scfm range on the first four MSIVs (limit is 6 scfm). The only apparent difference between the tests was the seat packing.
I Currently, the actuators on the inside four MSIVs are being modified and are scheduled for completion on 12/5. Next the MSIVs will undergo three days of preoperational testing,
' including stroke testing and additional leak testing.
3.
Violation of Technical Specifications:
None.
I Forn-27 yyg B709300388 070924:
PDR FDIA O
. WETTER HB7-43B PDR
, = -e.
d
~
a Eh 4.
Reportable Events:
On 11/27 SBGTS auto started due to spiking on the Reactor Building Ventilation Effluent Radiation Monitor. The spikes
. tripped the ventilation system and. auto started SBGTS to maintain
. Reactor Building differential pressure. The radiation monitor is being evaluated.
On 11/28 and 11/29Lthe SBGTS auto started due to tripping of a Reactor Building Ventilation supply fan. The tripping of a supply fan was'the automatic response'to a high Reactor Building differential pressure signal. However, the signal appeared to have been a false signal caused by wind effects on the atmospheric pressure tap.
Further, the sensing lines to:
differential pressure instrument appeared to be reversed, causing j
the trip at an improper setting.
(
l 4
on 12/3 with all control rods inserted, a full scram occurred due to loss of power in both RPS trip logic buses. The loss of power resulted when electrical leads were crossed during MSIV J
modifications, and the fuses blew.
On 12/3 following the above scram, a Group 2 scram occurred due to an improper electrical iso'lation. After resetting the Channel A scram, the MSIV work was electrically isolated from the RPS trip logic buses. However, the breaker opened to do'this interrupted power to the G scram pilot solenoid on Channel A, causing a scram of Group 2 control rods (Channel B had not been reset).
5.
Planned Activities:
NMP-2 has scheduled completion of MSIV actuator modifications by l
12/5 and completion of MSIV testing by 12/8. The hydrostatic test of the vessel seals is scheduled for 12/10.
Based on the current schedule, NMP-2 projects a 12/25 initial criticality. We continue to believe this date overly optimistic and believe an l
early January criticality would be the earliest.
l-l l
Fr lin; 6.-
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- - Inoperable.RB exhaust rad monitor (LCO violat. ion) 11/9
.Two APRM reactor trips due to faulty circuit card (ENS) 11/10 Inoperable RB exhaust rad monitor (ENS) 11/15 - Fuel loading completed L
11/17 - Imbedded conduits without fire seals.(LCO violation) 11/20 - Half scram / ESF actuation due to loss of.UPS (ENS).
11/23 - Group 2 scram due to loss of power and APRM testing (ENS) 11/24 - Fire patrol errors found from 11/12 (LCO violation) 11/24 - CRD functional, friction, and scram testing completed
-11/25 - SEGTS auto start due to detached jumper (ENS) j l
11/27 - SBGTS auto start due to rad monitor spike (ENS)
{
t 1
11/28 - SBGTS auto' starts (2) due to RB ventilation trips (ENS)
)
11/30 - Completed installation of MSIV balls and leak tests-I 12/3 - Scram due to loss of UPS power.on crossed MSIV lead (ENS) l 12/3 - Group 2 scram due to improper electrical isolation (ENS) l cc:
T. Murley J. Allan W. Kane S. Collins S. Ebeneter T. Martin P. Eselgroth L. Bettenhausen W. Cook G. Meyer R. Starostecki, IE R. Bernero, NRR M. Haughey, NRR 1
l l
l u_--_---_-_.-.-_---