ML12088A148

Notification of NRC Triennial Heat Exchanger Inspection (05000298/2012003)

ML12088A148
Person / Time
Site:	Cooper
Issue date:	03/20/2012
From:	Thomas Farnholtz Region 4 Engineering Branch 1
To:	O'Grady B Tennessee Valley Authority
References
IR-12-003
Download: ML12088A148 (6)

See also: IR 05000298/2012003

Text

UNITE D S TATE S

NUC LEAR RE GULATOR Y C OMMI S SI ON

RE G IO N I V

1600 EAST LAMAR BLVD

AR L INGTON , TEXAS 7 60 11 - 4511

March 20, 2012

Brian J. OGrady, Vice President-Nuclear

and Chief Nuclear Officer

Nebraska Public Power - Cooper

Nuclear Station

72676 648A Avenue

Brownville, NE 68321

SUBJECT: COOPER NUCLEAR STATION - NOTIFICATION OF NRC TRIENNIAL HEAT

EXCHANGER INSPECTION (05000298/2012003)

Dear Mr.OGrady:

The purpose of this letter is to notify you that the U.S. Nuclear Regulatory Commission (NRC)

Region IV staff will conduct a triennial heat sink inspection at your facility. The inspection will be

comprised of one reactor inspector from the NRC Region IV office. The inspection will be

conducted in accordance with Inspection Procedure 71111.07T, "Heat Sink Performance."

The schedule for the inspection is as follows:

Onsite inspection: May 14 - 18, 2012

Experience has shown that this inspection is resource intensive for your staff. In order to

minimize the impact to your onsite resources and to ensure a productive inspection, we have

enclosed a request for documents needed for this inspection. Please note that the documents

are requested to be provided by April 30 2012. We request, that during the onsite inspection

week, you ensure that copies of analyses, evaluations, or documentation regarding the

implementation and maintenance of your heat exchanger program are available. Of specific

interest are those documents that establish that your heat exchanger program satisfies NRC

regulatory requirements and conforms to applicable NRC guidance. Also, appropriate

personnel knowledgeable of safety-related heat exchangers should be available to support the

inspector at the site during the inspection.

We have discussed the schedule for this inspection activity with your staff and understand that

our regulatory contact for this inspection will be Jim Flaherty of your licensing organization. If

there are any questions about this inspection or the material requested, please contact the

inspector, Greg Pick, at 817-200-1270 or by email, greg.pick@nrc.gov .

This letter does not contain new or amended information collection requirements subject to the

Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). Existing information collection

requirements were approved by the Office of Management and Budget, control number 3150-

0011. The NRC may not conduct or sponsor, and a person is not required to respond to, a

request for information or an information collection requirement unless the requesting document

displays a currently valid Office of Management and Budget control number.

In accordance with 10 CFR 2.390 of the NRCs Rules of Practice, a copy of this letter and its

B. OGrady -2-

enclosure will be available electronically for public inspection in the NRC Public Document

Room or from the Publicly Available Records (PARS) 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/

Thomas R. Farnholtz, Chief

Engineering Branch 1

Division of Reactor Safety

Docket: 50-298

License: DPR-46

cc w/enclosure: Electronic Distribution

B. OGrady -3-

Electronic distribution by RIV:

Regional Administrator (Elmo.Collins@nrc.gov)

Deputy Regional Administrator (Art.Howell@nrc.gov)

DRP Director (Kriss.Kennedy@nrc.gov)

DRP Deputy Director (Troy.Pruett@nrc.gov)

DRS Director (Anton.Vegel@nrc.gov)

DRS Deputy Director (Tom.Blount@nrc.gov)

Senior Resident Inspector (Jeffrey.Josey@nrc.gov)

Resident Inspector (Michael.Chambers@nrc.gov)

Branch Chief, DRP/C (Vincent.Gaddy@nrc.gov)

Senior Project Engineer, DRP/C (Bob.Hagar@nrc.gov)

Project Engineer, DRP/C (Jonathan.Braisted@nrc.gov)

Project Engineer, DRP/C (Rayomand.Kumana@nrc.gov)

CNS Administrative Assistant (Amy.Elam@nrc.gov)

Public Affairs Officer (Victor.Dricks@nrc.gov)

Public Affairs Officer (Lara.Uselding@nrc.gov)

Project Manager (Lynnea.Wilkins@nrc.gov)

Acting Branch Chief, DRS/TSB (Ryan.Alexander@nrc.gov)

RITS Coordinator (Marisa.Herrera@nrc.gov)

Regional Counsel (Karla.Fuller@nrc.gov)

Congressional Affairs Officer (Jenny.Weil@nrc.gov)

OEMail Resource

ROPreports

RIV/ETA: OEDO (Lydia.Chang@nrc.gov)

DRS/TSB STA (Dale.Powers@nrc.gov)

R:\_REACTORS\CNS 2012003 RFI 07T-gap ADAMS No.: ML12088A148

ADAMS: No Yes SUNSI Review Complete Reviewer Initials: GAP

Publicly Available Non-Sensitive

Non-publicly Available Sensitive

SRI:GAP/tek C:EB1

GPick TFarnholtz

/RA/ /RA/

03/20/2012 03/20/2012

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

ENCLOSURE

Heat Exchanger/Heat Sink Inspection Documentation Request

The following heat exchangers/heat sinks have been selected for inspection:

• Division II emergency diesel generator jacket water and lube oil heat exchangers

• Division II residual heat removal heat exchangers

• All reactor equipment cooling heat exchangers

Please provide the following documentation prior to the onsite inspection week, preferably no

later than April 30, 2012.

Test Documents

Copies of the last two heat exchanger tests for the selected heat exchangers (original test data

in work orders or filled in test procedures) and copies of condition reports associated with the

heat exchanger testing.

List of condition reports, with descriptions, associated with heat exchanger testing for the past 3

years (all safety-related heat exchangers).

Copies of applicable heat exchanger test procedures for the selected heat exchangers including

test conditions and acceptance criteria.

Copies of chemistry control procedures and results of chemistry sampling and a list of condition

reports concerning service water chemistry problems for the past 3 years.

Documents that show the as-found results are recorded, evaluated, and appropriately

dispositioned such that the as-left condition is acceptable.

Cleaning Documents

Copies of the last two heat exchanger cleaning results for the selected heat exchangers, original

data (found in filled test procedures or work orders) and condition reports associated with heat

exchanger cleaning.

Copies of the cleaning procedures that have acceptance criteria for the selected heat

exchangers.

List of condition reports, with descriptions, associated with heat exchanger cleaning for the

past 3 years (all safety-related heat exchangers).

Show that as-found results are recorded, evaluated, and appropriately dispositioned such that

the as-left condition is acceptable.

-1- Enclosure

Design Documents

Copies of vendor data sheets and design basis data for the selected heat exchangers.

The design margin of the heat exchangers (the maximum heat transfer rate achievable at

design basis conditions compared to the vendors design heat transfer rate).

Copies of calculations that show the heat exchangers will meet their design basis requirements

under worst case conditions. Calculation for the maximum allowable number of tubes plugged

and how many tubes are currently plugged.

For room coolers, calculations of the maximum room temperature under accident conditions and

determination that the coolers can maintain less than the maximum temperature under design

conditions.

Documents that show that the heat exchangers have been evaluated for potential water

hammer.

Calculations related to the instrument uncertainties of the instruments used during testing.

Corrective action reports concerning cavitation noise in any heat exchanger system.

The most recent audit report of heat exchanger testing and cleaning.

The most recent service water flow balance test results, both as-found and as-left.

Documents for the Ultimate Heat Sink

Testing documents or other equivalent methods that verify the performance of the ultimate heat

sink and its components.

Calculations that show there is sufficient water capacity for the required 30-day supply.

Procedures or work orders that show there is monitoring and trending of sediment build-up.

Procedures for periodic performance monitoring of heat transfer capability.

Procedures for the periodic performance of the ultimate heat sink structural integrity.

Documents that verify adequate chemistry monitoring to ensure adequate pH, calcium, etc. are

maintained.

Documents that explain the operation of the ultimate heat sink.

A description of the clean up system between the water supply and the ultimate heat sink.

If elements of the ultimate heat sink can freeze during cold weather, documentation or

calculations to show that there will still be sufficient water to meet design conditions under the

worst case freeze conditions.

-2- Enclosure

A description of the sump pump that circulates the water in the ultimate heat sink during freeze

conditions, and documentation which show that the sump pump and valves are safety-related.

Calculations of the maximum allowable amount of silt that can be in the ultimate heat sink, and

any condition reports written in the past three years about problems with silt.

List of condition reports, with descriptions, of problems with the ultimate heat sink for the past

three years.

Corrective Action Documents

List of corrective action documents, with descriptions, for the past 3 years for all safety-related

heat exchangers

Inspector Contact Information:

Greg Pick

Senior Reactor Inspector

817-200-1270

greg.pick@nrc.gov

Mailing Address:

US NRC Region IV

Attn: Greg Pick

1600 East Lamar Blvd.

Arlington, TX 76011-4511

-3- Enclosure