ML19354D903

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Provides Advance Submittal of FSAR Change Re Plants Accident Monitoring Design.Accident Monitoring Instrument Range for CCW Header Temp Is Changed to 30-150 F
ML19354D903
Person / Time
Site: Comanche Peak  
Issue date: 01/12/1990
From: William Cahill
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TXX-90019, NUDOCS 9001230303
Download: ML19354D903 (19)
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Text

{{#Wiki_filter:'. j memes nummun Log. # TXX-90019 1, File # 10010 C C 907.5 7UELECTRIC Ref. # 10CFRSO.34(b) January 12. 1990 Wimam J. Cabm, Jr. Eieruidw Mrr frc: Ment U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) ~ DOCKET NOS. 50-445 AND 50 446-ADVANCE FSAR SUBMITTAL - ACCIDENT MONITORING Gentlemen: The enclosure to this letter provides an advance submittal ofian FSAR change related to the CPSES accident monitoring design. The. design has been changed, such that the accident monitoring instrument range for "CCW Header Temperature" is 30-1500F. This range envelopes the anticipated maximum peak-for the Component Cooling Water (CCW) Heat Exchanger Outlet temperature (1360F). However, the new range is a deviation from the-specified range of 32-2000F in Regulatory Guide 1.97, Revision 2. q In order to facilitate NRC staff review of these changes.nthe enclosed i information related to the FSAR change is organized as-.follows: 1. Revised FSAR pages, with changed portions indicatedLby a bar in the margin (denoted as "78"). as they are to appear in a future-amendment (additional pages immediately preceding and/or following the revised pages are 3 provided if needed to understand the change).- 2. A line-by-line description / justification for revised FSAR item. 1 3. The bold / overstrike version of the revised FSAR pages ~ referenced by the description / justification for each item identified.above. The bold / overstrike version facilitates review of the revisions' by: - l highlighting each addition.of new text in= bold type font..andr overstriking. with a slash (/) the portion of the text that is deleted. In some cases, where the bold overstrike version is unavailable, a ha'nd-marked-up version will be provided. 4. A copy of the TU Electric 50.59 evaluation, boM /// -a 9001230303 900112 PDR ADOCK 0500 5 ^ 400 North Olive Street LB. 81_ Dallas Texas 75201 -

ls '.; i ' 't. I-e TXX-90019 January 12, 1990 Page 2 of 2 TV Electric requests that the NRC perform an expedited review of the above-FSAR change and inform us to their acceptability, if additional information, such as calculations, drawings, procedures, etc., is' required to be. submitted on the CPSES docket to complete the review, please contact Veronica Cornell at (214)812-8886. The same design applies to Unit 2. However, hardware changes will be completed prior to Unit-2 fuel load. Sincerely, 5

  1. 71h*

i William J. Cahill, Jr. By: W #A Roger"D. Walker Manager, Nuclear Licensing VPC/smp Enclosure i c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) j 1 i i E i l

Enclosure to-TXX 90019' Pag'4 1 of 17 ACCIDENT MONITORING 1. Revised FSAR pages pp. 2 5 2. Line by-line description / justification pp. 7 l 3. Bold / overstrike version pp. 8 -'11-4. 50.59 evaluation pp. 12 - 17 1 l i I -t 1 i . [1 l g.

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Enc'osure to TXX-90019 l

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CPSES/FSAR f TABLE 032.110-4 i 1 (Sheet 6) l

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Table 032.110-5 3 Or Variable Ltgg R.G. 1.97 Rev. 2 CPSES Reference aS o5 Containment Additional Required Not available (25) i l66 Og l Radiation Information i -4 CST Water Level , Additional, Required Not Available (26) 66 0 Informaticin 66 4 l o h CR Area Radiation Range 10-IR/hr to 10 R/hr 10-leR/hr to 10 eR/hr (1) 66 4 4 Category Category 2 Category 3 (7) 78 i 4 4 PASS Room Area Range 10-IR/hr to 10 R/hr 10-leR/hr to 10 sR/hr (1) 66 Radiation Category Category 2 Category 3 (7) 76 Plant Vent Stack Range 10-IR/hr to 10 R/hr ' 10-leR/hr to 10 eR/hr - (1) 66 i 4 4 Area Radiation Category' Category 2 Category 3 (7) 76 4 4 i Not Lab Area Range 10-IR/hr-to 10 R/hr 10-leR/hr to 10 eR/hr (1) 66 Radiation Category Category 2 Category 3 (7) 76 RNR Pump Room - Category Category 2 Category 3 (7) -l76 Area Radiation i Nigh Level Instrument Top to 80ttom 0-1005 (1) 78 Radioactive Liquid Range , JS, Tank Level. vy si &, Plant and Environs Instrument Multichannel Not Lab (29) N ','76 Radioactivity Range gamma-ray NOSF 78 i 3 spectrometer 78 't l CCW Header Range: 320F-2000F ~ 300F-1500F (2) Temperature t t 6 O Y m 9 9 m 3 + v-,- 4 , er- * ' - - w- 'evv w- +c ..- e ei+=*. -7* + Aa '-

Endlesure to TXX 90019 CPSES/FsAR , Page 5 of 17 TABLE 032.110 6 (Sheet 1 of 6) Sunnortino Justification of alternatives for deviations from the cuidance in Rec. Guide 1.97. Rev. 2 (1) These instrument ranges deviate from the specific ranges listed 66 in Table 2 of Reg. Guide 1.97, Rev. 2, but have been found. acceptable for CPSES's s;)ecific requirements based on the-finding that the CPSES specified ranges cover the anticipated ranges for normal operation, anticipated operational occurrences and accident ednditions. The highest temperatuare in the component cooling water headerb,kh (2) is 1360F-CPSES selected range of 1500F since it provides a better scale reading on the control board indictor. (3) Deleted 66 (4) Table 2 to Reg. Guide 1.97, Rev. 2, designates the variable, Containment Isolation Valve Position, as' category l' and as a - type B variable under Maintaining Containment-Integrity. In the. CPSES plant specific analysis (see the CPSES FSAR, Section 7.5) the key-type 8 variables for Containment Environment are Containment Pressure (NR). Containment Radiation Level. Containment Water Level, and Containment. Hydrogen Concentration. Containment Isolation Valve Status was considered a type C backup variable for eenitoring Containment' Boundary' Integrity.- j Therefore, Containment Isolation Valve Status is~ category 2 for CPSES. Each penetration into the containment has-two isolation 1 boundaries.- l o i q \\ l _ _ __ ___ _ __ _ _- J

CPSES FSAR AMENONENT 78 '.' ', Enc'losure to TXX 90019 DETAILEO DESCRIPTION-page:1 Page 6 of 17 ^ FSAR Page (as amanded) Groun baseriptica Table 7.5 7 2 See Sheet No(s):11 Accident Monitoring Revision: The accident monitoring variable "CCW Header Temperature" instrument range has been revised. A calculation was performed to determine the maximum heat loads from the components cooled by component cooling water (CCW), that.would maximize CCW temperature. The' calculation took into consideration various plant conditions (i.e. startup, normal, cooldown, refueling, refueling with core dump, S signal and LOCA) for determining the-h10 hest temperature. The resulting maximus CCW temperature was approximately 136 degrees F. Based on this temperature, the "CCW' Header Temperature" instrument range was changed from 0 200 to 30 -- 150 degrees F. Although the new range-deviates from the' instrument range specified in Reg Guide 1.97, Rev. 2., the range is adequate to cover the maximus anticipated CCW temperature-and improves the-accuracy and readability of the instrument. The accuracy improved from +/- 6.2 to +/ 13.5 degrees F. Note that this change is a plant enhancement that improves the accuracy and readability without changing the purpose and function of the instrument. No new fa11ure mode is. introduced by=this' change. This change was evaluated under the TU Electric 50.59 process.as described in TXX 89718, dated 9/28/89. FSAR Change. Request Number: 89-862.1 Related SSER Sect 1on: SSER12 App T' SER/SSER lapact: Yes -The SER/SSER does not reflect CCW Header Temperature as' a deviation. Q&R Table 032.110 1 2 See Sheet No(s):06 Accident Monitoring Revision: The accidont monitoring variable "CCW Header Temperature" instrument range has-been revised. The

l new-range is 30 - 150 degrees F. This is-a-deviation i

free Reg Guide 1.97, Rev. 2, as noted.in this Table. For' additional details see FSAR change description Table 7.5-7, sheet 11. for CCW Header Temperature.= This change was evaluated under.the TV Electric 50.59 process as described in TXX-89718. dated 9/28/89. FSAR Change Request Number: 89-862.3 Related SSER Section:.SSER12 App T-SER/SSER Impact: Yes-The SER/SSER does not reflect CCW, Header Temperature as a deviation. i Q&R Table 032.110 1 2 See Sheet No(s):13 j

CPSES'FSAR AMENDMENT 78~ . Enc'Iosure to TXX-90019 DETA! LED DESCRIPTION Page 2 p,, 7 of 37 FSAR Page-(as amanded) Attug Beatriation Accident Monitoring Revision: The accident monitoring variable "CCW Header Temperature" instrument range has been revised. The new range.is 30 150 degrees F. This is a deviation from Reg Guide 1.97, Rev. 2, even though the new range envelopes the maxieue anticipated ranges. For additional details. see the description for Table 7.5-7 sheet 11 for "CCW Header Temperature." This change was evaluated under the TU Electric 50.59 process as described in TXX 89718, dated 9/28/89. FSAR Change Request Number: 89 862.2 Related $5ER Section: SSER12 App T SER/SSER Impact: Yes .The SER/SSER does not reflect CCW Header Temperature as a deviation. Q&R Table 032.110 5 2 See Sheet No(s):01 Accident Monitoring Revision:: The accident monitoring variable "CCW Header Temperature" instrument range has been revised. The new range is 30 - 150 degrees F. The justification for this deviation from Reg Guide 1.97, Rev. 2. is noted in this Table. For additional details, see FSAR description. Table 7.5-7. sheet 11. This change was 1 evaluated under the :TU Electric 50.59' process-as described in TXX 89718 dated 9/28/89. i FSAR Change Request Number: 89-862.4 Related SSER Section: SSER12 App T SER/SSER Impact: Yes The SER/SSER does not reflect CCW Header. Temperature as a deviation. 1 1 I I i J

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^ CPSES/FSAR TABLE 032.110-4 t (Sheet 6) f ' mm -E5' Table 032.110-5 o Variable Itan R.G. 1.97 Rev. 2 CPSES Reference _ o" c ' ) Containment Additional Required Not available (25) l l 66 U j Radiation Information x [ CST-Water Level - Additional Required Not Available (26) 66 Information 66 g> l66 CR Area Radiation Range 10-IR/hr to 10 R/hr 10-ImR/hr to 10 eR/hr (1) 4 4 l Category Category 2 Category 3 (7) I 4 4 PASS Room Area Range 10-1R/hr to 10 R/hr 10-leR/hr to 10 eR/hr (1) 66 Radiation Category Category 2 Category 3 (7) 76 Plant Vent Stack Range 10-IR/hr to 10 R/hr 10-leR/hr to 10 eR/hr (1) 66 4 4 l Area Radiation Category Category 2 Category 3 (7) 76 4 4 Hot Lab Area Range

10-IR/hr to 10 R/hr 10-leR/hr to 10 eR/hr (1) 66 o

Radiation Category Category 2 Category 3 (7) 76 RHR Pump Room Category Category 2 Category 3 (7) l 76 f Area Radiation i High Level Instrument Top to Bettas 0-1995 (1) Radioactive Liquid Range Tank Level P1 ant and Environs Instrument Nultichannel Not Lab (29) Radioactivity Range gamma-ray NOSF spectrometer CCW Header Range 32*F-200'F 30*F-150*F (2) Temperature r e W m L - a w s m 1. . 2m a.- m.sa... ^a-mT a

Enc'losure to TXX 90019 CPSES/FSAR

  • Page 11 of 17 TABLE 032.110 5 (Sheet 1 of 6)

Sunnertine Justification of alternative

  • for deviations from the auidance in Rec. Guide 1.97. Rev. 2 (1)

These instrument ranges deviate from the specific ranges listed 66 in Table 2 of Reg. Guide 1.97. Rev. 2, but have been found acceptable for CPSES's specific requirements based on the I finding that the CPSES specified ranges cover the anticipated ranges for normal operation, anticipated operational occurrences and accident conditions, e Jf c (2) Thehighesttamperetgrei the component cooling water header. is 1360F. CPSES selected range of 1500F since it'provides a 66 better scale reading on the control board indi tor.9didfdd (3) Deleted 66 (4) Table 2 to Reg. Guide 1.97,-Rev. 2 designates the variable, Containment Isolation Valve' Position, as. category 1 and as a type B variable under Maintaining Containment Integrity.- In the-CPSES plant specific-analysis-(see the CPSES FSAR, Section.7.5) the key type 8 variables for Containment Environment are Containment Pressure (NR), Containment Radiation Level. l Containment Water Level, and Containment' Hydrogen Concentration. Containment Isolation Valve Status was: considered-a type C 1 backup variable for monitoring Containment Boundary Integrity, j Therefore.. Containment Isolation Valve Status'is: category 2 for CPSES. Each penetration into the containment has two isolation-boundaries. I -1 1 I e i

Enclosure to TXX-90019 s

  • Page 12'of 17-

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Enclosure to TXX 90019

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j . Enclosure to TXX 90019 ~ Paga 17 of 17 i i ATTACHIERIFF 1 1 i ACTIVITf.WCRIFFI0tt l Dch-eg333 Rev. O ghanges the control rose indicator range from 0-300 F to 30-150 F. This range change and asseeisted 4 re-calibration rove the acouracy and readability of this instrument. IIe hardware replacement is involved and no new failure modes are introduoed by this change. The instruments purpose and function remain unohanged emospt for improved *F to 1 aoogracy and readability. The amourney changed fres 1*6.3 j 3.1 F. The maniana ccw heat e--rrr 2 outlet temperature is 133.s'F per calculations 16345-IEB(t)-1si Rev. 3 and 16345-310(3)-033 nov. 3 and DBD-IIB-329 Sev. 4. svA147ATIcer no. so-oop i [ k i g } 5 i l l i l l l f ? 1 l ? j s 4 e 4 .}}

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