ML12167A263

Supplemental Response to Requests for Additional Information for License Renewal Application

ML12167A263
Person / Time
Site:	South Texas
Issue date:	06/07/2012
From:	Rencurrel D South Texas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
G25, NOC-AE-12002868, STI: 33559064, TAC ME4936, TAC ME4937
Download: ML12167A263 (6)

Text

Nuclear Operating Company South Texas Prolect Electric Generating Station PO. Box 289 Wadsworth, Texas 77483 June 7, 2012 NOC-AE-12002868 10 CFR 54 STI: 33559064 File: G25 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Supplemental Response to Requests for Additional Information for the South Texas Proiect License Renewal Application (TAC Nos. ME4936 and ME4937)

References:

1. STPNOC letter dated October 25, 2010, from G. T. Powell to NRC Document Control Desk, "License Renewal Application" (NOC-AE-1 0002607) (ML103010257)

2. STPNOC letter dated January 18, 2012 from D. W. Rencurrel to NRC Document Control Desk, "Response to Requests for Additional Information for the South Texas Project License Renewal Application Aging Management Program, Set 10 (TAC Nos. ME4936 and ME4937)" (NOC-AE-12002779) (ML12020A072)

3. STPNOC letter dated February 27, 2012 from D. W. Rencurrel to NRC Document Control Desk, "Response to Requests for Additional Information for the South Texas Project License Renewal Application Aging Management Program, Set 12 (TAC Nos. ME4936 and ME4937)" (NOC-AE-12002797) (ML12069A024)

By Reference 1, STP Nuclear Operating Company (STPNOC) submitted a License Renewal Application (LRA) for South Texas Project (STP) Units 1 and 2. By Reference 2, STPNOC provided a response to Request for Additional Information (RAI) 3.3.1.88-2. By Reference 3, STPNOC provided a response to RAI 3.0-1a. This letter supplements the response to the RAIs with revision to Table 3.0-1 of the LRA. Changes to LRA are depicted as line-in/line-out pages provided in the enclosure to this letter.

There are no regulatory commitments provided in this letter.

Should you have any questions regarding this letter, please contact either Arden Aldridge, STP License Renewal Project Lead, at (361) 972-8243 or Ken Taplett, STP License Renewal Project regulatory point-of-contact, at (361) 972-8416.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on 6wta 7,2rD1rel Chie NRencurrel Chief Nuclear Officer KJT

Enclosure:

STPNOC LRA Changes with Line-in/Line-out Annotations 4tj 9-77 OPC.-

NOC-AE-12002868 Page 2 cc:

(paper copy)

(electronic copy)

Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 1600 East Lamar Boulevard Arlington, Texas 76011-4511 Balwant K. Singal Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North (MS 8B1) 11555 Rockville Pike Rockville, MD 20852 Senior Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 289, Mail Code: MN116 Wadsworth, TX 77483 C. M. Canady City of Austin Electric Utility Department 721 Barton Springs Road Austin, TX 78704 John W. Daily License Renewal Project Manager (Safety)

U.S. Nuclear Regulatory Commission One White Flint North (MS 011-Fl)

Washington, DC 20555-0001 Tam Tran License Renewal Project Manager (Environmental)

U. S. Nuclear Regulatory Commission One White Flint North (MS 011 F01)

Washington, DC 20555-0001 A. H. Gutterman, Esquire Kathryn M. Sutton, Esquire Morgan, Lewis & Bockius, LLP John Ragan Chris O'Hara Jim von Suskil NRG South Texas LP Kevin Polio Richard Pena City Public Service Peter Nemeth Crain Caton & James, P.C.

C. Mele City of Austin Richard A. Ratliff Alice Rogers Texas Department of State Health Services Balwant K. Singal John W. Daily Tam Tran U. S. Nuclear Regulatory Commission

Enclosure NOC-AE-12002868 Page 1 of 4 STPNOC LRA Changes with Line-in/Line-out Annotations List of Revised LRA Sections RAI 3.3.1.88-2 3.0-1a Affected LRA Section Table 3.0-1 Table 3.0-1

Enclosure NOC-AE-12002868 Page 2 of 4 RAI 3.3.1.88-2 Supplemental Information Table 3.0-1 Mecha Evaluated Environment Borated Water Leakage nical Environments Mechanical Environments NUREG-1801 Environment Description Air With Reactor Coolant Leakage.

Air With Borated Water Leakage.

Air With Reactor Coolant Leakage (Internal)

(RPV Leak Detection Line IV.A2-5)

Air With Metal Temperature up to 2880 C (5500 F)

[Pressurizer Integral Support - IV.C2-16]

System Temperature up to 3400 C (6440 F)

[Steam Generator Closure Bolting and TLAA]

The b

-orated water leakage enVironment applies in planti and-outdoorA-areas that include components and systems that.

coentain berated wAhatelr an;d-that ol leak onearby The borated water leakage environment applies to plant systems that contain reactor coolant or treated borated water and Dlant systems that are in the vicinity of reactor coolant or treated borated water systems. Borated water can potentially leak onto the external surfaces of the system pioina, components, or insulation that contain the borated water and can potentially leak onto nearby system components, structures, or insulation in the vicinity of the borated water svqth.m

.1 ________________________________________________________

i

~

Enclosure NOC-AE-12002868 Page 3 of 4 RAI 3.0-1a Supplemental Information Lubricating Oil Lubricating Oil Lubricating oils, including hydraulic oils, are low-to-medium viscosity hydrocarbons, with the possibility of containing contaminants and/or moisture, used for bearing, gear, and engine lubrication and in valve actuators. Lubricating oil and hydraulic oils are monitored for the possibility of water by the Lubricating Oil Analysis program.

Plant Indoor Air (When used as Internal)

Condensation (Internal)

Air [Glass Piping Elements VII.J-7 and VIII.I-4]

Moist Air or Condensation

[Diesel Piping Components VII.H2-21]

Indo*or *ar o non Pr dried c e

with temperatures higher than the dew point. C-ondefnation can oc,,r but onl rarely; equipment su~faces are normally dry. Plant indoor air (internal) or A

no dried compressed gas i%; evaluatedr,,,ith the NUREG 1801 environment of condensation when the air con-tains siniifiGRnt amounts nof moiu (enrUgh to cause loss of mnaterial) and th ite-rna;l suaehas temperatue below-.A the d-eW poimnt. Plant Indoo-Pr Air i

vauaedwth h NUREG 1801 environment of condensation when used for the drains associated with the intern-al -surfaces exposed to cnnPdnsation Plant indoor air environmenAnt vlua,tP with conden.ation Or moist air are co..n.deed to be potentiall aporessive w~hen Guae otaminants are Eoresent.

Plant Indoor Air (Internal) is air with temperatures at or below the dew point. Condensation is assumed to occur and the environment is potentially agqressive. Plant Indoor Air (Internal) includes non-dried compressed air and gases. Plant Indoor Air (Internal) is used for the internal surfaces of drain lines.

Enclosure NOC-AE-12002868 Page 4 of 4 Table 3.0-1 Mechanical Environments (Continued)

Mechanical Environments Evaluated Environment NUREG-1 801 Environment IDescription Plant Indoor Air (When used as External)

Air - Indoor Uncontrolled (External)

Air - Indoor Uncontrolled (Internal/External)

Air Indoor Air - Indoor Controlled (External) [VII.J-1 and VIII.1-13]

Air With Leaking Secondary Side Water and/or Steam [Steam Generator (Once Through) -

IV.D2-5]

Air With Steam or Water Leakage [Closure Bolting]

Indoor afir with temperatures higher than the dew point.

ConRdensation can occur, but only rarely; equipment surfaces are nRrmally dry. Plant in r aiOr is;,4 ev aluated ýwit

'4, ;-h the INUR EG# 18.,-,, ;.0 1\\

,'.RV*,4 M

fh

~~*-

l¢.

z

-f m

a-,÷.-,'

NUREG 180.1 en1ironment Of condensation whe~n the i containS significant amon -ts of moisturWe (enough to cause loss omateia) and the external surface has tcmperatureS below the dew point. Plant ind.

air is evaluated with th NUREG 1801 enVironment of condensation when used for the drains associated with the external surfaces exposedt condensatio.R Plant indoor air cn-ronmcts evauIa.ted waith cndensatior er moerist air are conSidered to be potertiall ggressve whenp surface conRtaminants are present.

Plant Indoor Air (External) is air with temperatures higqher than Condensation (External) the dew point. Condensation can occur, but only rarely; comoonent surfaces are normally dry. Condensation is only assumed to occur on external surfaces of plant components in chilled water and air conditioning systems. These plant systems may produce external component surface temperatures at or below the dew point. Plant Indoor Air (F~t~rn~I~ with nnnr1~ns~tion is nnt~nti~IIv ~nnmssIvP~

Potable Water This Environment is not in NUREG-1801 Water treated for drinking or other personnel uses.