IR 05000312/1986003

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Insp Rept 50-312/86-03 on 860106-10.No Violation or Deviation Noted.Major Areas Inspected:Lers,Followup of Insp Finding & 10CFR21 Repts Re Tdi Diesel Generators
ML20153E276
Person / Time
Site: Rancho Seco
Issue date: 01/16/1986
From: Willett D, Thomas Young
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To:
Shared Package
ML20153E260 List:
References
50-312-86-03, 50-312-86-3, NUDOCS 8602240474
Download: ML20153E276 (5)
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s U. S. NUCLEAR REGULATORY COMMISSION ~

REGION V

Report No.

50-312/86-03 Docket No.

50-312

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License No.

DPR-54-Licensee:

Sacramento Municipal Utility District P. O. Box 18530 Sacramento, California 95813 Facility Name:

Rancho Seco Nuclear Generating' Station Inspection at:

Clay Station, California Inspection conducted:

January 6-10, 1986

- Inspector:

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/T). J.Willett[ReactorInspector Date Signed

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Approved By:

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T. Young, Jr.,:Cgef E p ring Section Date Signed

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Summary:

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Inspection on January 6-10, 1986 (Report No.150-312/86-03)

Areas Inspected: Routine, unannoudced safety' inspection of-LER's; follow-up

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of inspection. findings; 10 CFR,Part 21 reports regarding.Transamerica De ' Laval'

Diesel Generators. This inspection involved 35 hours4.050926e-4 days <br />0.00972 hours <br />5.787037e-5 weeks <br />1.33175e-5 months <br /> onsite and 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of inoffice inspection by one NRC inspector.- Inspection Procedures 92704B,.92700 and 36100 were covered.

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Results: Of the three areas inspected, no violations or deviations were identified.

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. DETAILS

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' 1.. -Persons' Contacted

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1 * Steve Redeluer, Plant Siuperintendent :

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  • Robert,Roehler, Licensing ~

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  • Wally Koepke ;QC Supervisor

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  • Harvey Canter, QA Operations Supervisor

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  • John'McColligan, Ast. Mgr. Nuclear Plant'

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  • Ron, Colombo,4 Regulatory Compliance Supervisor-i

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  • John Bobbitt,-Mechanical Engineer

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  • Jim Kaminski, Mechanical Engineer u

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. * John'Jewett, Quality' Assurance Supervisor,

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  • Steve Crunk, Supervisor Incident Analysis '

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E Jerry Barker, Quality Assurance Eagineer

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i Jim Jerkovich,' Construction' Supervisor

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Louis Fusco,= Construction Engineer

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Wane Niderost,,TDI Factory Rep.

Niel'Thibodaux,LPlanning Engineer

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The inspector also held discussions ~with'other licensee and contract

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personnel duringcthis: inspection. This included plant staff engineers,-

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i technicians, administrative' assistants and quality assurance personnel.

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  • Denotes those attending exit me'eting on January 10,19'86.

2.

LER Follow-up

The following'LER'_s were evaluated by the inspector. Factors examined:

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included: report timeliness, inclusion of required information,' adequacy-

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of proposed corrective action and the need for furtherffollow-up

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inspection..

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Diesel Generator "B" failed to. follow normal shutdown

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LER 85-09 (Closed)

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sequence. The diesel would not respond to an under' voltage on'the buss ~

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unless the 15 minute idleishutdown' cycle sequence had timed,out.=

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Corrective action:

'A new relay was installed which instantaneously;

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interrupts-and re' sets the shutdown sequenceMon any.dieselLstart' signal. ~

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LER 85-13 (Open) ' Diesel "A" Started dueLeo-an'over.. voltage condition on

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the ESF buses caused by starting:n third 0 Reactor" Coolant Pump =(RCP) while

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' load on the_12.47 K_V. winding of the.NSS transformer was-elow,

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s Corrective actions: A contractor is evaluating 11ong-term correctivec ~

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action. A root cause analysis,is underwayL _ Thefinterim corrective-

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, action to; prevent recurrencej is control room / Standing Order 34-85, which -

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states: Do not start a'ECP unless switchyard voltage is'less than 232 KV.:,>

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Follow-up-Inspection-cp

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NRC open item number PJ-03-30 (0 pen) ?This item concerns the-licensee's.

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program to develop short and long ters'c'ontrolsuforitheir' surveillance

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program. and?is',being followed"up as;'a rdsu~lt of theJ11c'ensee's -

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repetitive requests 1for extensionsfof refueling surveillances. The licensee's QA staff identified the need for a more systematic approach:

'to scheduling'surveillancesi.

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As..part of th'e program to establish strong'er: control lover.

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planing / scheduling activities,qthe licensee identifjes,.in the daily,

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morning meeting,-any overdue surveillances (those.that are past the due

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date but within the 25% margin) C. Additionally,_the licensee'has

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T intensified efforts to! complete surveilla'ncessprior toltheir due date.

. hile this interim ~ action'is?in place,ttheclicensee~ hasitask,a contractor.

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contractor is reformatting surveillanc'es" lance: prog' ram.s Current 19, this ~ q (S&W) to develope a computerized surveil

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a computerized. system,'?which,is envisioned tolbeloperational.in approximately_one year.

Th'is'iteswillbefollowed-upiduringa

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subsequent inspection.

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Transamerica DeLaval<Inc.(TDI) Diesel Generators' 6 *

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The inspector reviewed, son a', sample basis, documentation associated with

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ithe installation,. inspection,tdesign, and; licensing for the TDI-diesel.

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generators (DSR-48,.In-line 8 similar to those installed at Shoreham.

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' nuclear plant) installed at Rancho Seco. 'In addition to the

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documentation review, the inspector held 1 discussions with supervisors,-

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and personnel responsible for-installation, inspection,-design and

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documentation for the TDI diesels.

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The program'for installation,~ inspection,; testing,Llicensing and turnover for operation of the.TDI diesel generators is as tfollows:

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The program is identified by Phases.

Phase A was the'_

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disassembly / reassembly, in~spection,. modification,~and verification of

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tolerances, hardness'and torquing forfboth diesels.

During'this pnase, C

the crank shaft oil holes for both diesels were:UT'd'and inspected;_ the'

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piston ~ skirts for both diesels were replaced'and'eain bearings were

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inspected / replaced.

Phase I is the startupLtesting and inspection phase.

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which is currently underway. Two of:the tests to:be' completed during;

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3this phase are the. required 69/n' tests identified?in' Reg. Guide 1:108,and.

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' the torsiograph testing.

Phase B,.which is a' disassembly and: inspection,-

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will be completed after the diesels:have completed;aL100. hour; endurance

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run.

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This run'is currently scheduledsfor July and' August:1986, with Phase B in

, September and October. ' Concurrently,'during theseiphases, the? licensee;

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intends to submit documentation (March'1986);forilicensing the TDI' diesel-

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facility.

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The licensee belongs'to a TDI owners group and/asisuch is implementing

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the owners group _ recommendations._.. The owners group recommendations.are-

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to 'also be implemented. in Phases. "Their. Phase 1. consists fofL16 core

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issues'which must be completed: prior'to licensing.. Phase 2 consists'of

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i inspection and, resolution of lesser issues. TRoughly,; Phase-1 corresponds to Phase'A and Part of I.

Phase 2-is currently.. scheduled to be completed ~

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after cycle 9 refuel, although the licensee; expects to.have the majority-

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of-these issues and work resolved by the completion!of; Phase B.

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Thos'e 10 CFR part;21 issues which remain open will~be:fol'1' owed up and-closed during a subsequent; inspection.,

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Thefollowingissues,InformationiNoticeland10'CFRPart21 reports,were

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reviewed-and addressed during this)inspectiont,

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NRC'open ~ TDI.

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item No.

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'I.D.-Noi Subject; Resolution

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DW-82-01 No.112 No.2-Engine governor * Material-changed-Closed

. drive coupl.ing by mftr prior to

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material .,

delivery to.

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Rancho Seco 84-04-P No.126

' No.27 Fuel control Verify pins

- Open shaft installed and torqued during Phase I work

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85-04-P No.127 No.34 Air filter in'

Inspectito.verifyLOpen'

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engine control composition panel

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85-07-P No.128 No.30 Air start syst.

Duo-check valves Open 85-11-P rec'd for installation

85-08-P No.129 No.31 011 plug' fail, Inspect and Open i

replace During Phase I work

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85-21-P No.132 No.39 Intake / exhaust pending-Open spring failure-86-01-P No.116 No.13 Wrong assembly

"_ test reassemble and Open Woodward Gov.

86-02-P No.117 No.15 Fuel line Check for vibra-.. 0 pen-tion.

Prevent

' spray of' broke

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line 86-03-P No.120 No.23 Failure of over Dismantle, inspect, Open drive coupling _ correct during speed gov..

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. PhaseLB 86-04-P No.121 No.25 Failure of lube Modify lube system Open-~

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oil to. turbo

'during Phase _I-86-05-P'

No.123 No.40 Valve spring None warranted--

Closed.

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failure

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86-06-P do.124'

.No.26 Fue1~ injection Inspect during.

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pump defect

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'85-13-P No.130 No.33 ~

Switchgear.

. Add fans"or Open

. overheating venti 11ation-

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Monitor Temp's.

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86-07-P No.131 No.36 Lube oil check-Change' valve seat:

Open:

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valves to BUNA'N material'

83-58

.No.14-Crank Shaft

- SMUD. Crank's are-Closed IE Info failure

-:13 in. diameter

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Notice with 12 in. crank pins. Ref. Apri1~_20:

1984 ltr, Rodriguez to Stoltz

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Exit Interview-

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The inspector met with representatives (denoted-in paragraph 1)-at the conclusion of.the insp'ection en January ~10, 1986.

The scope and. findings-of the inspection, which were discussed during the exit-interview,';are~

set forth in paragraphs 2 through 4'of this report.

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