ML20090K787
| ML20090K787 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/16/1992 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| REF-GTECI-130, REF-GTECI-NI, TASK-130, TASK-OR GL-91-13, TXX-92120, NUDOCS 9203190298 | |
| Download: ML20090K787 (4) | |
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[55%fgega Log # TXX-92120
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File # 10119 2-GL 91-13
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Ref. # 100FR50.54( f )
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TUELECTRIC March 16, 1992 Williant J. Cahill, Jr.
anapve rraske U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAR STEAM ELECTRIC STA110N iCPSES)
DOCKET NOS. 50-445 AND 50-446 REQUEST FOR INFORMATI0H-ESSENTI AL (STATION) SERVICE WATER SYSTEM, MRC GENERIC LETTER 91-13 REF:
Request for Information Related To The Resolution of Generic Issue 130, " Essential Service Water System Failures At Multi-Unit Sites,' Pursuant To 10CFR50.54(f)-Generic Letter 91-13 Gentlemen:
- NRC has issued Generic Letter (GL) 91-13 (Reference) to inform the licensees of technical findings regarding the resolution of Generic issue-130.
In addition, the Generic Letter requests information regarding the applicability and implementation of the suggested Technical Specifications and the emergency procedure improvements for a Lo.s of Service Water (LOSW) event.
The NRC believes that the estimated benefit from the identified i
safety enhancements will be a reduction in the core damage frequency and a reduction. in the associated risk of offsite radioactive releases as a result of. Essential Service Water System failure. The following response is provided to this request.
DESCRIPTION OF STATION SERVICE WATER CROSSTIE:
CPSES'has two 100 percent capacity Station Service Water pumps per Unit.
These four pumps have crosstie capability such that any pump may supply any
- other pump's cooling loads-The unit crosstie piping is ASME Class 3 and contains five manual gear operated butterfly valves (XSW-0006, XSW-0007, XSW-0008, XSW 0028 and XSW-002]).
Each train's crosstie isolation valve is maintained in the normally closed position.
The Unit 1/ Unit 2 crosstie valve (XSW-0006) is presently locked closed during the construction of Unit 2 and will be maintained in the normally closed position during two unit operation.
To establish a crosstie between the Units, three of these valves-(including XSW-0006) must be opened (See Figure 1).
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TXX-92120 Page 2 of 2 fiL2.1_lj_ADMINISTR ATIVE IttPROVEMENT (FIR 5T BUQC1 ON PAGE 2)t
" Technical specification (TS) changes contained in Enclosure 1
[of Gl. 91-13] to enhance the availability of 'he [Emergenty Service Water 3ystem] ESWS as applied to the dealgn ccaflguration of effected plants.'
$_P1(S RESPONSE 1 TV Electric has reviewed the recommendations of Generic Letter 91-13 and will propose a revision to the CPSES Techniccl Specifications and their Bases to addresh the concerns of the Generic letter 91-13.
{il 91-13 ADMINISTRA_Tly.( IMPRYDiEHLLSECOND BULLET ON,f AJLM 4
- 1mprovement of emergency procedures for LOSH using existing design features, specifically:
(a) operating and m intaining high-pressure injection (HPI) pump integrity in the evcat of loss of reactor coolaut pump (RCP) seals as a result of ESWS failure, and tb) testing and manipulating the ESWS crosstie between the units during a LOSW accident.*
LP,$11 MSPONSE :
TO Electric reviewed both the abnormal and eraergency procedures for LOCW conditions and concluded that the existing CPSES Unit 1 procedure';
adequately address the above res.ommendations.
The CPSES Unit F procedures will address these recommendatians io a similar manner.
The Orcposed change to the Technical Specifications and t5eir bases are expected to be incorporated into the CPSES license upon issuance of the CPSES Unit I and 2 comoined Technical Specifications.
The affected Unit 2
,a procedures will be implemented upon issuance of the Unit 2 cparating license.
Sunporting docutrentation for Gl. 91 13 responses will be available at tha CPSES site for NRC review after completion of all action items for f.ach Unit.
Sincerely, f
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e William J. tlahill, Jr.
j MCP/gj Attachments c - Mr. R D. Mart.n, Region IV Resident inspectors. CPSES (2)
Mr. T.
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- to 1XT 92120 Page 1 of 1 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION in the Matter of
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Texas Utilities Electric Company
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Docket Hos. 50-445
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and 50-446
- (Comanche Peak Steam Electric
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Station, Unit 1 & 2)
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AFFlDAVIT William J. Cahill, Jr. being duly sworn, hereby deposes and seys that he is Group Vice President, Nuclear of TO Electric, the lead Applicant herein: that he is duly authori7.ed to sign and file with the Nuclear Regulatory Commissian this response to NRC Generic Letter 91-13: for the captioned facility: that he is familiar with the content thereof: and that the matters set forth therein are true and correct to tie best of his knowledge, information and belie'.
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illiam J. Cahk 1 Jr.
Group Vice President Nuclear i-STATE OF TEXAS
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COUNTY OF DALLAS )
l Subscri;ed and sworn to before me, on this _ _ 16th day of March
, 1992, l
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