IR 05000282/1981004
| ML20003G021 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 03/18/1981 |
| From: | Burgess B, Feierabend C, Little W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20003G019 | List: |
| References | |
| 50-282-81-04, 50-282-81-4, 50-306-81-04, 50-306-81-4, NUDOCS 8104280067 | |
| Download: ML20003G021 (5) | |
Text
.
.Ps U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No: 50-282/81-04; 50-306/81-04 Docket No:
50-282;51-306 License No: DPR-42; DPR-60 Licensee: Northern States Power Company 414 Nicollet Mall Minneapolis, MN 55401 Facility Name:
Prairic Island Nuclear Generating Plant
~ Inspection At:
Prairie Island Site, Red Wing, MN 55066 Inspection Conducted: February 1-28, 1981
'
?
Inspectors:
A
$ /]/ ff
/
.J.
ierabend
$
3 /3/8/
B. L. Burgess
,
e./
.
Approved By:
'
W S t
e, Chief
/[
,
Reactor Projeccs Section 2C
/
'
Inspection Summary l
!
Inspection on February 1-28, 1981 (Report No. 50-282/81-04; 50-306/81-04)
l Areas Inspected: Routine resident inspection of plant operation, maintenance, surveillance, security, radiation protection, and followup on IE Bulletins.
The inspection involved a total of 176 inspector hours onsite by two NRC l
l inspectors including 41 inspector hours onsite during off-shifts.
Results: No items of noncompliance were identified.
.
t 8104280067
-
-
.
DETAI1S 1.
Personnel Contacted F. Tierney, Plant Manager J. Brokaw, Plant Superintendent, Operations and Maintenance E. Watzl, Plant Superintendent, Plant Engineering and Radiation Protection A. Hunstad, Staff Engineer R. Lindsey, Superintendent, Operations J. Nelson, Superintendent, Maintenance J. Hoffman, Superintendent, Technical Engineerine D. Mendele, Superintendent, Operations Engineer'
D. Schuelke, Superintendent, Radiation Protectf.
A. Smith, Senior Scheduling Engineer M. Klee, Superintendent, Nuclear Engineering K. Albrecht, Senior Quality Assurance Engineer D. Haugland, Engineer G. Lenertz, Engineer K. Beadell, Engineer D. Stember, Engineer G. Miller, Engineer D. Hansen, Inservice Inspection Engineer C. Harmsen, Supervising Engineer K. Kehren, Assistant Construction Superintendent D. Cragoe, Shift Supervisor G. Edon, Shif t Supervisor P. Ryan, Shif t Supervisor M. Balk, Shift Supervisor T. Goetsch, Shift Supervisor D. Walker, Shif t Supervisor P. Valtakis, Shif t Supervisor 2.
Operational Safety Verification a.
General Unit 1 operated routinely throughout the month. Unit 2 was shut down on February 21 for scheduled refueling and maintenance, b.
Control Room Observations The inspector observed control room operations, reviewed cpplicable logs, conducted discussions with control room operators and observed shift turnovers. The inspector verified the operability of selected emergency systems, reviewed equipment control records, and verified
'
proper return to service of affected components.
c.
Tours Tours of the auxiliary, turbine and containment buildings, and external areas were conducted to observe plant equipment conditions, including potential. fire hazards, and to verify that maintenance requests had been initiated for equipment in need of maintenance.
-2-
.
-.
By observation and direct interview, the inspector verified that security procedures were being implemented in accordance with the plant security plan.
The inspectors observed plant housekeeping / cleanliness conditions, and verified implementation of radiation protection controls.
During one of the. tours the inspector observed a-contractor improperly entering a posted area without protective shoe cove >>. The licensee HP technician took immediate corrective action to assure that no activity was spread from the area. The' technician completed surveys of the individual, supervised proper exit from the area and made an appropriate report to his supervisor.
During a tour of containment, the inspector observed licensee personnel respond to an injury of a contractor employee who had hit his head on a beam and was unconscious for a short period of time. Licensee HP technicians and onsite nurse gave first aid and accompanied him in an ambulance to the hospital for examination. The inspectors observed that the event was handled professionally, demonstrating ability to respond to an emergency.
d.
Independent Verification The inspectors performed walk downs of the accessible portions of the cooling water system. This included confirmation of selected portions of the licensee's procedures, checklists, and plant drawings, inspectiot of conditions of components and piping supports, inspection of breakers and cabinets, verification of selected instruments for proper valving, equipment control locks or tags and comparison of remote and local indication.
3.
Maintenance a.
Review of Work Request (WR's) and Work Request Authoritation (RRA's)
The inspector selected and reviewed several WR's and WRA's to determine the status of safety related systems, to verify that proper priorities were given and to verify that design changes were initiated where appropriate. The WRA's were generated as part of the licensee's actions responding to "TMI Lessons".
1) Review of a portion of design change 80Y118, Reactor Coolant System Venting, included WRA's E-0971-RC-Q through E-0979-RC-Q controlling fabrication and installation of head vent pipe, valves and support brackets.
2) WRA's reviewed as a portion of design change 80Y125, Route RHR Sump Pump Discharge to Containment, included WRA's D6644-WL-Q through D6648-WL-Q, D6650-WL-Q and D6652-WL-Q. These WRA's included hangars and RHR sump discharge pipe from the RHR rits to the shield wall area.
-3-
.. -.
-
.
-
-- -..~.
.
.
. - -
..
- -.
._.
- -.
,
.
t i
g.
3) ' Reviewed WRA E0413-EE-Q, Assemble EA-180l Limit Switches with Conax-
[
Seals. Also verified traceability of. material' (limit switches and
.
[
seals), observed assembly in the maintenance shop _and observed ~
l-
. licensee quality contro1' audit of the WRA in progress.
i. =
'4) _ Review of _ a portion of design change 80Y127,: Safety Injection
,
i
' Piping Reroute included WRA's D7417-SI-Q through D7426-SI-Q -
controlling installation of hangars _ and-welding' pipe.
4-
b.
Observations 1) Preventive Maintenance
,
L The inspector observed preventive maintenance in progress, including
!
PM-3560-15 Rev.1
_New Fuel, Elevator Inspection, and PM-3560-18 -
'
Fuel Transfer System Inspection-Pit Side. These PM's are accomplished-annually by replacement of the air motors for the upenders for both i
units, utilizing a contract diver. During the replacement of Unit 2 :
!
air-motor, a small' leak occurred:in the diver's suit. The diver was
~
initially frisked for contamination and none was 'found, however, a-
- t whole body scan found that the diver had minimal external contamina- ~
i
'
tion. Af ter showering, the whole body ~ scan was repeated with. sat-
}
isfactory results.
.
i 2) Design Changes
!.
L The inspectors periodically observed fitup and welding in progress for portions of design changes 80Y118, 80Y125'and 80Y127 (Paragraph
',
3.a above) and observed fitup and NDT' of welds for a containment i
electrical penetration,.part of design change 80Y116. The inspectors j
also observed licensee and contractor quality control personnel involvement in monitoring the work in progress.
[-
3) Diesel Cooling Water Pump No. D12 The inspector observed portions of troubleshooting and testing of D12 Diesel. Cooling Water Pump following trip of the diesel during
,
preparations to shutdown the pump after an operability test. The
,
trip was annunciated as an-overspeed trip, however, no audible or
visual ' indication of overspeed occurred. The licensee conducted-j additional testing and was able to repeat the trip, again with no
apparent actual overspeed. The licensee disabled the overspeed i
trip via a lif ted wire, using the plant bypass procedure, 'to assure that overspeed trip will not occur, pending receipt of a replacement i
overspeed switch.
i
{-
'The Operations Committee reviewed the occurrence, and determined that the pump was not made inoperable by actuation of the over-
!
speed trip, as the overspeed trip is bypassed by the SI signal,.
1.e. an SI signal occurring at any time, ~during testing or other-wise, would bypass the overspeed trip and'the diesel would continue to_run or restart if shutting down. The licensee plans'to forward
-
an informational report following replacement'of the switch and
[
retesting cf the system.
- _
-4-e
,
.m--
+
-%--,f,-.3..e+.,.yn,,,,,o.,,--.w-m-arw-
..
_
-p+w-+-w e - + r 'a e ~* mw c. es-< -- ee +eese -
-s-w e-*-r-we',--=--*****+---+er+wme
%e
,_
e
4.
Surveillance The inspectors witnessed portions of surveillance testing of safety related systems and components. Witnessing included verifying that the tests were
_
scheduled and performed within Technical Specification requirements, observing that procedures were being followed, that LOD's were not violated and that system res toration was completed.
Test witnessed included:
a.
SP-1091 Unit 1 Fan Coil Monthly Surveillance Tesc was satisfactory, b.
SP-1049 Unit 2 Main Steam Safety Valve Test The Main Steam Safety Valve Test was conducted immediately after Unit 2 shutdown for refueling. Two rafety valves that did not relieve within test specification were adjusted and retested satisfactorily.
c. SP-1180 Diesel Cooling Water System Test The inspector observed portions of retest following trouble-shooting of spurious overspeed trips. (Paragraph 3.b.3 above)
5.
I.E. Bulletins The inspector completed review of the licensee's actions in response to the following Bulletin and verified that the required actions are complete.
a.
IEB 81-01 Surveillance of Mechanical Snubbers No INC mechanical snubbers are used in the plant.
(Closed)
6.
Exit Interviews The inspector conducted interim interviews during the inspection period and met with Messrs. Tierney, Watz1 and Hunstad at the conclusion of the inspection. The inspector discussed the scope and results of the inspection.
i The licensee confirmed that an informational report would be submitted describing the actions taken to resolve the diesel cooling water pump trips. (Paragraph 3.b.3)
l t.
f
-5-r
,
I
'.t