ML062330307

Errata for Diablo Canyon Power Plant - NRC Problem Identification and Resolution Inspection Report 05000275/2006012 and 05000323/2006012

ML062330307
Person / Time
Site:	Diablo Canyon
Issue date:	08/21/2006
From:	Laura Smith NRC/RGN-III/DRS/EB2
To:	Keenan J Pacific Gas & Electric Co
References
IR-06-012
Download: ML062330307 (7)

See also: IR 05000275/2006012

Text

August 21, 2006

John S. Keenan

Senior Vice President - Generation

and Chief Nuclear Officer

Pacific Gas and Electric Company

P.O. Box 770000

Mail Code B32

San Francisco, CA 94177-0001

SUBJECT: ERRATA FOR DIABLO CANYON POWER PLANT - NRC PROBLEM

IDENTIFICATION AND RESOLUTION INSPECTION REPORT

05000275/2006012 AND 05000323/2006012

Dear Mr. Keenan:

Please remove the first page of the cover letter and enclosures page 5 and 10 of NRC Problem

Identification and Resolution Inspection Report 05000275;323/2006012 and replace with the

pages enclosed with this letter. The purpose of the change is to make editorial corrections to

reflect that no findings of significance were identified and that a telephonic re-exit was

conducted.

In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter, its

enclosure, and your response will be made available electronically for public inspection in the

NRC Public Document Room or from the Publicly Available Records component of NRC's

document system (ADAMS). ADAMS is accessible from the NRC web site at

http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

Sincerely,

/RA/

Linda J. Smith, Chief

Engineering Branch 2

Division of Reactor Safety

Docket: 50-275, 323

License: NPF-80, NPF-82

Enclosures:

As stated

Pacific Gas and Electric Company -2-

cc w/enclosure:

Donna Jacobs

Vice President, Nuclear Services

Diablo Canyon Power Plant

P.O. Box 56

Avila Beach, CA 93424

James R. Becker, Vice President

Diablo Canyon Operations and

Station Director, Pacific Gas and

Electric Company

Diablo Canyon Power Plant

P.O. Box 56

Avila Beach, CA 93424

Sierra Club San Lucia Chapter

ATTN: Andrew Christie

P.O. Box 15755

San Luis Obispo, CA 93406

Nancy Culver

San Luis Obispo Mothers for Peace

P.O. Box 164

Pismo Beach, CA 93448

Chairman

San Luis Obispo County Board of

Supervisors

County Government Building

1055 Monterey Street, Suite D430

San Luis Obispo, CA 93408

Truman Burns\Robert Kinosian

California Public Utilities Commission

505 Van Ness Ave., Rm. 4102

San Francisco, CA 94102-3298

Diablo Canyon Independent Safety Committee

Robert R. Wellington, Esq.

Legal Counsel

857 Cass Street, Suite D

Monterey, CA 93940

Director, Radiological Health Branch

State Department of Health Services

P.O. Box 997414 (MS 7610)

Sacramento, CA 95899-7414

Pacific Gas and Electric Company -3-

Richard F. Locke, Esq.

Pacific Gas and Electric Company

P.O. Box 7442

San Francisco, CA 94120

City Editor

The Tribune

3825 South Higuera Street

P.O. Box 112

San Luis Obispo, CA 93406-0112

James D. Boyd, Commissioner

California Energy Commission

1516 Ninth Street (MS 34)

Sacramento, CA 95814

Jennifer Tang

Field Representative

United States Senator Barbara Boxer

1700 Montgomery Street, Suite 240

San Francisco, CA 94111

Pacific Gas and Electric Company -4-

Electronic distribution by RIV:

Regional Administrator (BSM1)

DRP Director (ATH)

DRS Director (DDC)

DRS Deputy Director (RJC1)

Senior Resident Inspector (TWJ)

Branch Chief, DRP/D (WBJ)

Senior Project Engineer, DRP/D (FLB2)

Team Leader, DRP/TSS (RLN1)

RITS Coordinator (KEG)

DRS STA (DAP)

V. Dricks, PAO (VLD)

J. Lamb, OEDO RIV Coordinator (JGL1)

ROPreports

DC Site Secretary (AWC1)

SUNSI Review Completed: __LJS ADAMS: / Yes G No Initials: LJS

/ Publicly Available G Non-Publicly Available G Sensitive / Non-Sensitive

R:\_DC\2006\DC2006-012RP-RWD.wpd ML

RIV:SRI/EB2 C:EB2 C:PSB C:EB2

DLProulx LJSmith WBJones LJSmith

/RA/ /RA/ /RA/ /RA/

8/18/06 8/18/06 8/18/06 8/21/06

OFFICIAL RECORD COPY T=Telephone E=E-mail F=Fax

August 9, 2006

John S. Keenan, Chief Nuclear Officer

Pacific Gas and Electric Company

Mail Code B32

P.O. Box 770000

San Francisco, California 94177-0001

SUBJECT: DIABLO CANYON POWER PLANT - NRC PROBLEM IDENTIFICATION AND

RESOLUTION INSPECTION REPORT 05000275/2006012 AND

05000323/2006012

Dear Mr. Keenan:

From June 5 through 22, 2006, the U. S. Nuclear Regulatory Commission (NRC) conducted the

onsite portion of a team inspection at your Diablo Canyon Power Plant. The enclosed report

documents the inspection findings, which were discussed with your staff as described in

Section 4OA6 of this report.

This inspection examined activities conducted under your license as they relate to the

identification and resolution of problems, and compliance with the Commission's rules and

regulations and the conditions of your operating license. The team reviewed approximately

280 action requests, associated non-conformance reports and apparent cause evaluations, and

other supporting documents. The team reviewed cross-cutting aspects of NRC and

licensee-identified findings and interviewed personnel regarding the condition of a safety

conscious work environment at the Diablo Canyon Power Plant.

On the basis of the sample selected for review, the team concluded that, in general, your

processes to identify, prioritize, evaluate, and correct problems were effective; thresholds for

identifying issues remained appropriately low and, in most cases, corrective actions were

adequate to address conditions adverse to quality. Notwithstanding the above, a relatively high

number of self-revealing and NRC identified findings were noted at your site during the

assessment period. Ineffective and incomplete corrective actions led to a number of repeat

problems that could have been prevented, with a notable number of repeat findings of

previously documented NRC-identified and self-revealing findings. Overall however

performance had improved in the all areas of your corrective action program since the last

problem identification and resolution inspection. The team concluded that a safety-conscious

work environment existed at your Diablo Canyon Power Plant.

Based on the results of this inspection, no findings of significance were identified.

In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter, its

enclosure, and your response will be made available electronically for public inspection in the

Example 4: The licensee failed to correct the population of Rockwell-Edwards valves in

safety-related and risk-significant system that were susceptible to failure of the packing

gland follower flange because they did not properly identify all of the potentially affected

valves. (IR 2003008)

b. Prioritization and Evaluation of Issues

(1) Inspection Scope

The team reviewed ARs, work orders, and operability evaluations to assess the

licensees ability to evaluate the importance of adverse conditions. The inspectors

reviewed a sample of ARs, apparent and root cause analyses to ascertain whether the

licensee properly considered the full extent of causes and conditions, generic

implications, common causes, and previous occurrences. The inspectors also attended

various meetings to assess the threshold of prioritization and evaluation of issues

identified.

In addition, the team reviewed licensee evaluations of selected industry operating

experience reports, including licensee event reports, NRC generic letters, bulletins and

information notices, and generic vendor notifications to assess whether issues

applicable to Diablo Canyon Power Plant were appropriately addressed.

The team performed a historical review of ARs and notifications written over the last 5

years that addressed the emergency diesel generators, safety related switchgear

ventilation, the auxiliary feedwater system, and the component cooling water system.

(2) Assessment

The team concluded that problems were generally prioritized and evaluated in

accordance with the licensees corrective action program guidance and NRC

requirements. The team found that for the sample of root cause reports reviewed, the

licensee was generally self-critical and thorough in evaluating the causes of significant

conditions adverse to quality. Notwithstanding the above, ineffective prioritization and

evaluation of issues resulted in a relatively high number of self-revealing and NRC

identified findings during the period. One of these findings culminated in a plant trip.

Others were related to equipment deficiencies, some of which resulted in inoperable

safety-related equipment.

The team found that for the sample of root cause reports reviewed, the licensee was

generally self-critical and thorough in evaluating the causes of significant conditions

adverse to quality. The team noted that the quality and rigor of root causes had

improved when compared to the previous problem identification and resolution

assessment. Additionally, the trend of NRC identified findings with problem

identification and resolution aspects in evaluation of problems has been improving since

2004, with six findings in 2004 and two in 2005. The team concluded that the licensee

had improved in performance in the area of prioritization and evaluation

-5- Enclosure

(I) Oil Found in the Vicinity of Residual Heat Removal Pumps

During a walkdown of the residual heat removal pumps during the weeks of

June 5 and June 19, 2006, inspectors noted oil in the vicinity of the drain plugs

for the motors for Residual Heat Removal Pumps 1-1, 2-1, and 2-2. The team

questioned the licensee as to the source of the oil, specifically questioning

whether the motors were leaking from the motor oil drain plugs during operation.

Additionally, the inspectors discovered that the licensee was not performing the

72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> cure time for the drain plug sealant recommended by the vendor which

would ensure proper sealing characteristics. The team noted that any small

leakage combined with the required lengthy mission time for the pumps could

result in a situation where a loss of adequate inventory of motor oil could occur

and challenge long term operation of the pumps.

The licensee performed a prompt operability assessment to provide reasonable

assurance of operability of the pumps based on the observed conditions.

Additionally the licensee made plans to measure leakage from the pumps during

the next pump runs. Because the inspectors could not ascertain the source and

the rate of the oil leakage until the pumps are run and could not determine the

effect of a shortened sealant cure time, the team treated this issue as an

unresolved item: URI 05000275,323/2006012-01, Oil Found in the Vicinity of

Residual Heat Removal Pumps.

4OA6 Exit Meeting

On June 22, 2006, at the end of the onsite portion of the inspection, the inspection

findings were discussed with Mr. J. Keenan and other members of the licensees staff.

The licensee acknowledged the findings.

A telephonic re-exit was conducted on August 9, 2006 with Mr. S. Ketelson, Regulatory

Services Manager, and other members of your staff.

The team asked the licensee whether any materials examined during the inspection

should be considered proprietary. The licensee did not identify any proprietary

information that may have been reviewed by the team.

Attachment: Supplemental Information

-10- Enclosure