ML18197A417

Notification of NRC Triennial Heat Sink Performance Inspection (05000498/2018003 and 05000499/2018003) and Request for Information

ML18197A417
Person / Time
Site:	South Texas
Issue date:	07/17/2018
From:	Thomas Farnholtz Region 4 Engineering Branch 1
To:	Gerry Powell South Texas
References
IR 2018003
Download: ML18197A417 (6)

See also: IR 05000498/2018003

Text

July 17, 2018

Mr. G. T. Powell

Interim President, Chief Executive Officer

and Chief Nuclear Officer

STP Nuclear Operating Company

P.O. Box 289

Wadsworth, TX 77483

SUBJECT: SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION -

NOTIFICATION OF NRC TRIENNIAL HEAT SINK PERFORMANCE

INSPECTION (05000498/2018003 AND 05000499/2018003) AND REQUEST

FOR INFORMATION

Dear Mr. Powell:

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

staff will conduct a triennial heat sink performance inspection at your South Texas Project

Electric Generating Station from September 10 - 14, 2018. The inspection will consist of two

reactor inspectors from the NRCs Region IV office for one week. The inspection will be

conducted in accordance with NRC Inspection Procedure 71111, Attachment 07, Heat Sink

Performance.

Experience has shown that this inspection is resource intensive both for the NRC inspectors

and 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 September 3, 2018. Also,

appropriate personnel knowledgeable of heat exchangers should be available to support the

inspectors 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 Robyn Savage of your licensing organization. If

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

inspector, Chris Smith, by telephone at 817-200-1095 or by e-mail at Chris.Smith@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 Title 10 of the Code of Federal Regulations (CFR) 2.390 of the NRCs

Agency Rules of Practice, a copy of this letter and its 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).

G. Powell 2

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 Nos.: 50-498 and 50-499

License Nos.: NPF-76 and NPF-80

Enclosure:

Triennial Heat Sink Performance Inspection Request for Information

ML18197A417

X SUNSI Review ADAMS: Non-Publicly Available X Non-Sensitive Keyword:

By: X Yes No X Publicly Available Sensitive

OFFICE RI:EB1 RI:EB1 C:EB1

NAME CSmith JBraisted TFarnholtz

SIGNATURE /RA by /RA/ /RA/

Email/

DATE 07/17/18 07/17/18 07/17/18

Request for Information

Triennial Heat Sink Performance Inspection

South Texas Project Electric Generating Station

Inspection Report: 05000498/2018003; 05000499/2018003

Inspection Dates: September 10 - 14, 2018

Inspection Procedure: IP 71111.07, Heat Sink Performance, Triennial Review

Inspectors: Chris Smith, Reactor Inspector, Lead

Jonathan Braisted, Reactor Inspector

Information Requested for the In-Office Preparation Week

The following information should be made available to the lead inspector, Chris Smith, by

September 3, 2018. Please note that additional information may be requested during the onsite

portion of the inspection. It is preferable to have the information provided in electronic format,

although the information may also be sent to the Region IV office in hard copy to the attention

the lead inspector. Also, we request that you categorize the documents in your response with

the numbered list below. If any requested documents are large and only hard copy formats are

available, please inform the inspector, and provide the documentation during the first day of the

onsite inspection. Additionally, requested documents such as corrective action program

documents are to be for the time period from the current onsite inspection back to the previous

triennial heat sink performance inspection. Requested documents such as surveillances,

maintenance tasks, or thermal performance tests are to be the last three performances of those

activities. If the requested documentation does not apply to the sample selection for this

inspection, no response is necessary. If the information requested above will not be available or

if there are questions regarding this information request, please contact the lead inspector as

soon as possible.

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

• Spent Fuel Pool Heat Exchanger 1A (3R211NHX101A)

• Reactor Containment Fan 11B Cooler Cooling Coil (2V141VHX003)

• Electrical Auxiliary Building Main Air Handling Unit Cooling Coil (3V112VHX010B)

• Ultimate Heat Sink

I. For the selected heat exchangers that are directly cooled by the service water system,

as applicable:

1. Method and results of heat exchanger performance testing (last 3 results)

2. Method and results of heat exchanger inspection and cleaning (last 3 results)

3. Procedures for heat exchanger operation

4. Relevant updated final safety analysis report and technical specification pages

5. Relevant heat transfer calculations

Enclosure

6. Tube plugging maps, tube plugging criteria, and allowable tube plugging

7. Evaluations of water hammer in susceptible heat exchangers

8. Results from periodic flow testing or flow balancing (last 3 results)

9. Eddy current test reports and visual inspection records (last 3 results)

10. List (with descriptions) of corrective action program documents (last 3 years)

11. Heat exchanger data sheets, program manual, and design basis documents

12. Actions or commitments to NRC Generic Letter 89-13

II. For the selected heat exchangers that are directly cooled by a closed loop cooling

water system, as applicable:

1. Procedures for heat exchanger operation

2. Relevant updated final safety analysis report and technical specification pages

3. Relevant heat transfer calculations

4. Evaluations of water hammer in susceptible heat exchangers

5. Chemical treatment program for corrosion control

6. Results from periodic flow testing or flow balancing (last 3 results)

7. Tube plugging maps, tube plugging criteria, and allowable tube plugging

8. Eddy current test reports and visual inspection records (last 3 results)

9. List (with descriptions) of corrective action program documents (last 3 years)

10. Heat exchanger data sheets and design basis documents

11. Actions or commitments to NRC Generic Letter 89-13

III. For the selected heat sink samples, as applicable:

1. Results of inspections for seepage, settlement, rip rap protection, movement, sediment

intrusion, etc. (last 3 results)

2. Third party dam inspections (last 3 results)

3. Calculation(s) of sufficient reservoir capacity

4. List (with descriptions) of corrective action program documents (last 3 years)

2

Service water system (SWS) and UHS:

1. List (with descriptions) of design changes involving the SWS and the UHS (last 3 years)

2. Procedures for a loss of SWS or UHS

3. Relevant updated final safety analysis report and technical specification pages

4. Methods and results of macrofouling treatment and control (last 3 results)

5. Methods and results of biocide treatment and control (last 3 results)

6. Methods and results of chemistry monitoring (last 3 results)

7. Evaluation(s) of strong-pump weak-pump interaction in susceptible system designs

8. Results from periodic flow testing or flow balancing (last 3 results)

9. Design basis leakage rate assumptions

10. Results of monitoring of safety- to nonsafety-related portions (i.e., leakage of interface

valves) of the SWS (last 3 results)

11. List (with descriptions) of corrective action program documents, including thru-wall pipe

leaks (last 3 years)

12. Results of ultrasonic tests and visual inspections of SWS piping (last 3 results)

13. Results of buried or inaccessible pipe testing, inspection, or monitoring program (last 3

results)

14. For closed cooling water systems, trend data from make-up systems (last 3 results)

15. Results from program used to detect protective coating failure, corrosion, and erosion

(last 3 results)

16. Results of safety-related traveling screen and strainer performance tests (last 3 results)

17. Results of service water pump bay silt accumulation monitoring (last 3 results)

18. Results of service water pump bay level instrumentation calibrations (last 3 results)

19. Design basis documents

20. Actions or commitments to NRC Generic Letter 89-13

Inspector Contact Information:

Mailing Address: Chris Smith, Lead Jonathan Braisted

U.S. NRC, Region IV Reactor Inspector Reactor Inspector

Attn: Chris Smith 817-200-1095 817-200-1194

1600 East Lamar Blvd. Chris.Smith@nrc.gov Jonathan.Braisted@nrc.gov

Arlington, TX 76011-4511

3