IR 05000344/1986021

Insp Rept 50-344/86-21 on 860522-0606.No Violations or Deviations Noted.Major Areas Inspected:Activities Re Periodic Containment Integrated Leak Rate Test,Including Review of Procedures & Personnel Interviews

ML20206L503
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	06/13/1986
From:	Clark C, Jim Melfi, Thomas Young NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To:
Shared Package
ML20206L489	List: IR 05000344/1986021 ML20206L485
References
50-344-86-21, NUDOCS 8606300309
Download: ML20206L503 (5)

Text

. _ _ .

.

U. S. NUCLEAR REGULATORY COMMISSION

REGION V

-

j

.

Report No. 50-344/86-21

!

Docket No. 50-344 License No. NPF-1 l

i Licensee: Portland General Electric Company 121 S. W. Salmon Street i

i Portland, Oregon 97204 Facility Name: Trojan Nuclear Plant i

Inspection at: Rainier, Oregon i

In::pection Conducted: May 22 - June 6, 1986 Inspected By:

C. AgClark, Reactor Inspector / /2 8-

Dats Signed

.

Y M/4 * 4, s/96 elfi, Reactor'Irgfjfector Ete Signed

'

Approved By: O'. d!/ b

,

T Young, J Engineering ,[hief {

Section Dfate/$igned Summary:

Inspection During the Period of May 22 - June 6, 1986 (Report No. 50-344/86-21)

i

'

Areas inspected:

Routine,, announced inspection of activities relating to a periodic Containment. Integrated Leak Rate Test (CILRT). The inspection included review of procedures, interviews with personnel, witnessing portions of the CILRT, and inspection of containment. During this inspection, Inspection Procedures 61720, 70,307 and 70313 were covered.

'

,

Results: .No violations of NR rekuirementsordeviationswereidentifie ;

, ,

'

,, .

%

&

a

'

'

' 8606300309 860613

PDR ADOCK 05000344 a PDR I

4

.

.

DETAILS Persons Contacted

• J. D. Reid, Manager Plant Services

• C. H. Brown, QA Operations Branch Manager

• R. P. Schmitt, Manager, Operation and Maintenance

• A. S. Cohlmeyer, Engineering Supervisor

• M. H. Schwartz, Primary Plant Engineer

• R. Q. Reinhardt, Integrated Leak Rate Test (ILRT) Engineer

• S. A. Bauer, Nuclear Safety and Regulation Department Engineer

• H. F. Moomey, Trojan Resident, Oregon Department of Energy R. E. Blum, ILRT Engineer, Bechtel Power Corporation

• Denotes those personnel in attendance at the exit meeting.

!

The inspectors also interviewed other licensee and contractor employees involved with containment integrated leak rate test activitie . Containment Integrated Leak Rate Test (CILRT) Procedure Review The inspectors reviewed the licensee's CILRT procedures as described in Periodic Engineering Test - PET-5-1, Revision 7 of May 15, 1986

(and latest applicable temporar

change notices) entitled " Periodic

{ Containment Integrated Leakage .e Test." This review was to ascertain compliance with plant technical specifications, regulatory requirements, and applicable industrial standards as stated in the following documents:

Trojan' Nuclear Plant updated (July 1982) FSAR, " Containment Integrated Leakage Rate Test" (Section 6.2.6.1).

l

' Trojan Nuclear Plant Technical Specifications, " Containment Leakage" (Section 3/4.6.1.2).

'

Appendix J to 10 CFR 50, " Primary Reactor Containment Leakage i Testing for Water Cooled Power Reactors".

! *

American National Standard, " Leakage-Rate Testing of

!

Containment Structures for Nuclear Reactors," ANSI N45.4-197 *

Topical Report BN-TOP-1, Revision 1, " Testing Criteria for Integrated Leakage Rate Testing of Primary Containment Structures for Nuclear Power Plants," Bechtel Corporatio *

American National Standard, " Containment System Leakage Testing Requirements," ANSI /ANS-56.8-198 The inspectors reviewed the Portland General Electric Company computer program, developed for the computation of the Type A

-

.

, containment leakage rate. The inspectors reviewed the hand calculations used to verify the program as well as the output of the verification checks of the program, performed by both Bechtel and PGE using data from previous leak rate test No violations with NRC requirements or deviations were identifie b. Records Review The inspectors reviewed the records to assure that the following required activities were performed prior to initial pressurization:

(1) Completion of all identified local leakage rate testing and .

identification of leak rates prior to and after any repair The type B and C test data summary sheets reviewed, had not received the licensee final review yet, and contained some minor discrepancies. The "as found" leakage rates for cont'ainment chilled water. valves M0-10013 and CV-10014 (at penetration number P57-2) were >60,000 sec/ min., that is leakage was greater than the measuring capability of the test equipmen Since the "as found" leakage rate for penetration number P57-2 could not be determined at the time of this inspection, the "as found" condition of the primary containment *

,

cannot be properly determined and therefore the "as found" ILRT will be considered to have failed. This has the potential to impact the future test frequency of ILRT If two consecutive ILRTs are failed, then the ILRT test frequency must be revised from once every 40 months to once every 18 months (Technical Specification 4.6.1.2.b).

(2) Removal or venting of items listed on the valve lineup lis (3) Inspection of interior and exterior containment surfaces and components for evidence of deterioration or damag (4) Containment sump water levels below high level mar (5) CILRT measurement system properly installed, functionally checked, and all instrumentation calibrated within the last six months with NBS traceability certificates availabl (6) Pressurization system tested; including proper operation of the air compressors, after-coolers, moisture separators, air i dryers, valves and blowdown muffler / silence '

(7) Containment ventilation system adjustments complete (8) Valve lineups complete (9) Pressurization system in servic No violations with NRC requirements or deviations were identifie )

,

c. Observation of Work and Work Activities .

Prior to the CILRT the residents and regional inspectors performed area surveys for valve line ups and instrument location assignments within the Containment Building. The purpose of the instrument survey was to locate and evaluate the placement of the temperature and dewpoint sensors. This inspection revealed that the sensors were located within the tolerances of the installation procedur It was noted that some vent paths had double valve isolation and the caps were removed, but only one valve was verified open with an installed ta It was also noted that two installed test drain hoses appeared to be kink over enough to interfere with acceptable venting / draining of the associated piping. The licensee stated they were aware of the items identified by the inspectors, and corrected them prior to the tes The operation of the pressurization equipment (air compressors, j af ter-coolers and air dryers) used for pressurization of the Containment Bailding was inspected to assure that procedures for prevention of potential problems were enforced. This included evidence of hourly checking the pressurizing air for evidence of oil contamination, establishment of communications between CILRT control center and the pressurization station, adequate cooling water being supplied to the after-coolers, and that control of the after-cooler air temperature was being maintained during pressurizatio The inspectors witnessed the following CILRT activities:

(1) Initial pressurizatio (2) Stabilizatio (3) Data Acquisitio (4) Completion of CILR (5) Leakage Rate Verification Tes (6) Initial Containmer.t Building Depressurizatio Applicable electrical and mechanical penetrations were inspecte The valve lineups were completed in accordance with procedure, and no unidentified artificial barriers were crecte The overall performance of the CILRT crew members were observed by the inspector. Attributes evaluated were: availability of test procedure; test prerequisites being met; proper plant systems in service; special test equipment calibrated and in service; and crew actions timely and correct. Crew members had received CILRT training prior to the test; this appeared evident by satisfactory performance of their dutie The licensee commenced pressurizing the containment on May 27, 198 No excessive leakage paths were identified that would interfere with the satisfactory completion of the Type A tes On May 28, 1986, the licensee commenced taking data after the required stabilization period for containment temperature. The test was concluded after 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, followed by a superimposed leahag'e rate verification test for 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> *

- 4 e

The licensee's preliminary results for the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (Pa = 60 psig)

Type A test, which did not include Type B or C additions, were a total time calculated leak rate of 0.017 wt. % per day with a total time 95% upper confidence limit (UCL) leak rate of 0.130 wt. % per day and a " mass point" calculated leak rate of 0.009 wt. % per day with a " mass point" 95% UCL leak rate of 0.012 wt. % per da Following the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Type A Test, a 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> verification test was

performed with an imposed leak rate of Lo = 7.06 SCFM or 0.100%/ day, which produced a total time calculated leak rate of Lc = 0.127 wt. %

per day with a total time 95% UCL leak rate of 0.312 wt. % per day and a " mass point" cauculated leak rate of 0.097 wt. % per day with a " mass point" 95% UCL leak rate of 0.115 wt. % per day. These preliminary results appear to be within the latest allowed acceptance criteri No violations with NRC requirements or deviations were identifie . Exit Meeting i

I The inspectors met with licensee management representatives denoted in paragraph 1 on May 30, 1986. The scope of the inspection, observations and findings as noted in this report were discusse l

!

!

l

l l

l

,

l,