ML21265A356

Notification of NRC Triennial Heat Exchanger/Sink Performance Inspection (05000416/2021004) and Request for Information

ML21265A356
Person / Time
Site:	Grand Gulf
Issue date:	09/22/2021
From:	Vincent Gaddy Division of Reactor Safety IV
To:	Franssen R Entergy Operations
References
IR 2021004
Download: ML21265A356 (10)

See also: IR 05000416/2021004

Text

September 22, 2021

Mr. Robert Franssen, Site Vice President

Entergy Operations, Inc.

Grand Gulf Nuclear Station

P.O. Box 756

Port Gibson, MS 39150

SUBJECT: GRAND GULF NUCLEAR STATION - NOTIFICATION OF NRC TRIENNIAL

HEAT EXCHANGER/SINK PERFORMANCE INSPECTION (05000416/2021004)

AND REQUEST FOR INFORMATION

Dear Mr. Franssen:

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

staff will conduct the triennial portion of the heat exchanger/sink performance inspection at your

Grand Gulf Nuclear Station beginning on December 6, 2021. The onsite phase of 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 (IP) 71111,

Attachment 07, Heat Exchanger/Sink Performance, dated October 21, 2020.

The objectives of the inspection are to verify that: 1) any potential heat exchanger deficiencies

which could mask degraded performance are identified, 2) any potential common-cause heat

sink performance problems that have the potential to increase risk are identified, and 3) the

licensee has adequately identified and resolved heat sink performance problems that could

result in initiating events or affect multiple heat exchangers in mitigating systems and thereby

increase risk.

To minimize the impact the inspection has on the site and to ensure an efficient inspection, we

have enclosed a request for information needed for the inspection. It is important that these

requests are fulfilled as completely and accurately as possible to minimize any additional

requests during the preparation week or during the onsite inspection. The requests have been

divided into three groups.

The first group lists information necessary for our initial inspection scoping activities.

This information should be available to the lead inspector no later than October 25,

2021. By November 1, 2021, the lead inspector will communicate the selected 2-4 risk

significant or safety-related heat exchanger and/or heat sink samples. The lead

inspector will also communicate whether only a subset of the second group information

requests is required.

R. Franssen 2

The second group of information requested includes those items needed to support our

in office preparation activities. This set of documents should be available no later than

November 22, 2021. This information should be separated for each selected

component. Note that the inspector(s) may identify during the preparation week

additional information needed to support the inspection and will communicate those

requests as soon as practicable.

The third group of information requested includes the additional documentation identified

during in-office preparation activities as well as other resource requests necessary to

support our onsite inspection activities. The additional information or resources should

be available throughout the week of onsite inspection activities beginning on December

6, 2021.

All information requested is to be from the time of the last triennial heat exchanger/sink

performance inspection until the present. If no documents addressing a request fall within that

time, the request applies to the last applicable document. If a request does not apply (or there

are no responsive documents) for any heat exchanger/heat sink sample, no response is

necessary. Include all attachments or addendums to the requests.

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

regulatory contact for this inspection will be Mr. Jeff Hardy of your Regulatory Assurance

organization. If there are any questions about this inspection or the documents requested,

please contact the lead inspector, Jonathan Braisted, by telephone at 817-200-1469 or by e-

mail at Jonathan.Braisted@nrc.gov.

PAPERWORK REDUCTION ACT STATEMENT

This letter contains mandatory information collections that are subject to the Paperwork

Reduction Act of 1995 (44 U.S.C. 3501 et seq.). The Office of Management and Budget (OMB)

approved these information collections (approval number 3150-0011). Send comments

regarding this information collection to the Information Services Branch, Office of the Chief

Information Officer, Mail Stop: T6 A10M, U.S. Nuclear Regulatory Commission, Washington,

DC 20555-0001, or by e-mail to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office

of Information and Regulatory Affairs, NEOB-10202, (3150-0011) Office of Management and

Budget, Washington, DC 20503.

R. Franssen 3

PUBLIC PROTECTION NOTIFICATION

The NRC may not conduct nor 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 OMB control number.

In accordance with Title 10 of the Code of Federal Regulations 2.390 of the NRCs 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). ADAMS is accessible from the NRC Web

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

Sincerely,

Signed by Gaddy, Vincent

on 09/22/21

Vincent G. Gaddy, Chief

Engineering Branch 1

Division of Reactor Safety

Docket No. 05000416

License No. NPF-29

Enclosure: Triennial Heat Exchanger/Sink

Performance Inspection Request for

Information

cc w/ encl: Distribution via LISTSERV

ML21265A356

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

By: JDB Yes No Publicly Available Sensitive NRC-002

OFFICE RI:DRS/EB1 BC:DRS/EB1

NAME JBraisted VGaddy

SIGNATURE /RA/ VG

DATE 09/22/2021 09/22/2021

Request for Information

Triennial Heat Exchanger/Sink Performance Inspection

Grand Gulf Nuclear Station

Inspection Report: 05000416/2021004

Inspection Dates: December 6 - 10, 2021

Inspection Procedure: IP 71111.07, Triennial Heat Exchanger/Sink Performance

Inspectors: Jonathan Braisted, Reactor Inspector, Lead

Dustin Reinert, Reactor Inspector

I. Information Requested by October 25, 2021:

1. Copy of any heat exchanger/heat sink program documents including Generic Letter (GL) 89-13 programs or aging management programs (AMPs)

2. Copy of any original and/or supplemental responses to GL 89-13

3. Copy of any current requirements and/or commitments related to GL 89-13 or AMPs

4. Copy of any heat exchanger/heat sink program self-assessments, audits, etc.

5. Copy of the updated final safety analysis report, technical specifications (and bases),

and technical requirements manual (and bases)

6. List of safety-related, risk-significant, or GL 89-13 program heat exchangers in order of

risk significance

7. List of corrective action program documents related to heat exchangers/heat sinks

II. Information Requested by November 22, 2021:

1. For the selected heat exchangers that are directly cooled by the service water (or open

water) system:

a. Documentation of performance testing (i.e., heat transfer, temperature

effectiveness, etc.) and/or monitoring methods (i.e., pressure loss, temperature

difference, etc.) such as technical reports, complete work orders, implementing

procedures, etc.

b. Documentation of as-found/as-left periodic flow testing and/or flow balancing

such as technical reports, complete work orders, implementing procedures, etc.

c. Documentation of visual inspections, non-destructive examinations (i.e., eddy-

current, ultrasonic testing, etc.), and cleanings such as technical reports,

complete work orders, implementing procedures, etc.

Enclosure

d. Documentation of biotic fouling and/or macrofouling treatment such as technical

reports, complete work orders, implementing procedures, etc.

e. Copy of the tube plugging map, tube plugging criteria, and heat exchanger

margin if based upon tube plugging

f. Copy of any relevant design basis calculations including any evaluations of the

potential for water hammer

g. Copy of the applicable system health report, design basis document, and/or

system description

h. Copy of any relevant system piping and instrumentation diagrams

i. Copy of the heat exchanger design specification, heat exchanger data sheet, and

any relevant vendor manuals

j. Copy of the heat exchanger (and motor/fan if an air-to-water heat exchanger)

preventive maintenance (PM) schedule including the frequency of those PM

activities and their bases

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

system:

a. Documentation of performance testing (i.e., heat transfer, temperature

effectiveness, etc.) and/or monitoring methods (i.e., pressure loss, temperature

difference, etc.) such as technical reports, complete work orders, implementing

procedures, etc.

b. Documentation of as-found/as-left periodic flow testing and/or flow balancing

such as technical reports, complete work orders, implementing procedures, etc.

c. Documentation of visual inspections, non-destructive examinations (i.e., visual,

eddy-current, ultrasonic testing, etc.), and cleanings such as technical reports,

complete work orders, implementing procedures, etc.

d. Copy of the tube plugging map, tube plugging criteria, and heat exchanger

margin if based upon tube plugging

e. Results from chemical treatments such as technical reports, complete work

orders, implementing procedures, etc.

f. Copy of any relevant design basis calculations including any evaluations of the

potential for water hammer

g. Copy of the applicable system health report, design basis document, and/or

system description

h. Copy of any relevant system piping and instrumentation diagrams

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i. Copy of the heat exchanger design specification, heat exchanger data sheet, and

any relevant vendor manuals

j. Copy of the heat exchanger (and motor/fan if an air-to-water heat exchanger) PM

schedule including the frequency of those PM activities and their bases

3. For the selected ultimate heat sink (UHS):

a. Forced draft cooling tower or spray pond UHS:

i. Copy of any calculations that demonstrate sufficient reservoir capacity

ii. Documentation of periodic monitoring and trending of sediment such as

technical reports, complete work orders, implementing procedures, etc.

iii. Documentation of any performance monitoring of heat transfer capability

such as technical reports, complete work orders, implementing

procedures, etc.

iv. Documentation of UHS structural integrity monitoring such as technical

reports, complete work orders, implementing procedures, etc.

b. Operation of the service water system (SWS) and UHS:

i. List of modifications to the SWS and UHS

ii. Copy of procedures for a loss of SWS or UHS

iii. Copy of the applicable system health report, design basis document,

and/or system description

iv. Documentation of biotic fouling and macrofouling treatments such as

technical reports, complete work orders, implementing procedures, etc.

v. Documentation of chemistry monitoring such as technical reports,

complete work orders, implementing procedures, etc.

vi. Copy of any evaluation of strong-pump to weak-pump interactions

c. Performance testing of the SWS and UHS:

i. Documentation of inservice testing of SWS/UHS pumps, valves, and fans

such as technical reports, complete work orders, implementing

procedures, etc.

ii. Documentation of SWS flow balance testing such as complete work

orders, implementing procedures, etc.

iii. Documentation of diagnostic testing for valves that interface with safety-

related service water and nonsafety-related or nonseismic piping systems

such as complete work orders, implementing procedures, etc.

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iv. Documentation of performance testing of risk-significant nonsafety-related

functions (or alignments) of the SWS such as complete work orders,

implementing procedures, etc.

d. Service water and/or closed cooling water system:

i. Documentation of inaccessible pipe testing, inspection (i.e., visual,

ultrasonic, etc.), and/or monitoring such as technical reports, complete

work orders, implementing procedures, etc.

ii. Copy of any evaluations of active thru wall pipe leaks

iii. Copy of any corrective action documents related to thru wall pipe leakage

including trend evaluations

iv. For closed cooling water systems, copy of any trend data on make-up to

the system

v. Documentation of protective coatings inspections such as technical

reports, complete work orders, implementing procedures, etc.

vi. For deep draft vertical pumps, documentation of diagnostic testing (or

equivalent method) such as, technical reports, complete work orders,

implementing procedures, etc.

e. Service water intake structure (SWIS):

i. Copy of the PM schedule for traveling screens and strainers the

frequency of those PM activities and their bases

ii. Copy of any corrective action documents related to traveling screens,

strainers, trash racks, etc.

iii. Copy of any SWS/UHS normal and abnormal operating procedures

iv. Documentation of SWIS inspections regarding structural integrity and

silting such as technical reports, complete work orders, implementing

procedures, etc.

v. Copy of any service water pump bay water level instrument

documentation related to setpoints and calibrations such as calculations,

complete work orders, implementing procedures, etc.

vi. Copy of any SWS/UHS water temperature instrumentation documentation

related to setpoints and calibrations such as calculations, complete work

orders, implementing procedures, etc.

vii. Copy of any evaluations of the potential for frazil ice formation

viii. For underwater weir walls, copy of any evaluations of potential of silt

introduction

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4. UHS Containment Device or Dam

a. For an above-ground UHS encapsulated by embankments, weirs or excavated

side slopes:

i. Copy of weir or embankment design documentation, specification, etc.

ii. Copy of any licensee or third-party dam inspection documentation used to

monitor the integrity or performance of the heat sink

iii. Copy of any calculations for demonstrating sufficient reservoir capacity

iv. Documentation of significant debris or sediment build-up monitoring in the

UHS such as any technical reports, complete work orders, implementing

procedures, etc.

v. Copy of any corrective action program documents related to debris,

structural integrity, seepage, settlement, rip rap, etc.

b. For underwater UHS weirs, structures, or excavations:

i. Copy of any underwater weirs, structures, or excavations design

documentation, specifications, etc.

ii. Documentation of settlement or movement related to structural integrity

and/or capacity monitoring such as technical reports, complete work

orders, implementing procedures, etc.

iii. Documentation of sediment intrusion monitoring such as technical

reports, complete work orders, implementing procedures, etc.

iv. Copy of any calculations for demonstrating sufficient capacity

v. Copy of any corrective action program documents related to settlement,

movement, structural integrity, sediment, etc.

III. Additional Requests During Inspection Activities Beginning December 6, 2021

1. Supplemental requests identified during in-office preparation activities

2. Additional requests identified during onsite inspection activities

3. Discussions with relevant subject matter experts

4. Walkdowns of selected heat exchanger/heat sink samples

5. Corrective action program documents generated as a result of this inspection

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If any of the information requested above will not be available, please contact Jonathan Braisted

as soon as possible.

Inspector Contact Information:

Jonathan Braisted, Lead Dustin Reinert

Reactor Inspector Reactor Inspector

817-200-1469 817-200-1534

Jonathan.Braisted@nrc.gov Dustin.Reinert@nrc.gov

Mailing Address:

U.S. NRC, Region IV

Attn: Jonathan Braisted

1600 East Lamar Blvd.

Arlington, TX 76011-4511

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