ML20133J681
| ML20133J681 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/16/1985 |
| From: | Williams N CYGNA ENERGY SERVICES |
| To: | Council W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| 84056.088, NUDOCS 8510210035 | |
| Download: ML20133J681 (5) | |
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p 101 Caktornia Street. Suite 1000. San Francisco CA 941115894 415 397 5600 October 16,1985 84056.088 Mr. W.G. Council Executive Vice President Texas Utilities Generating Company Skyway Tower 400 North Olive Street, L.B. 81 Dollos, TX 75201
Subject:
Mechonical Systems Review Questions Comanche Peck Steam Electric Station independent Assessment Program - Phase 4 Job No. 84056 gm
Dear Mr. Council:
b Attached please find a list of the Phase 4 mechanical systems questions and open items, if you have any questions or require clarification prior to preparing a response don't hesitate to coll.
Very truly yours, N.H. Williams Project Manager Attachment cc:
Mr. V. Noonan (USNRC) w/ottochment
_ Mr. S. Burwell (USNRC) w/ottochment Mr. S. Treby (USNRC) w/ottochment Mr. W. Horin (Bishop, Liberman, et al.) w/ottachment Ms. J. von Amerongen (TUGCO/EBASCO) w/ attachment Mrs. J. Ellis (CASE) w/ottochment Mr. D. Pigott (Orrick, Herrington & Sutcliffe) w/ottochment Mr. F. Dougherty (TENERA) w/ottachment Mr. R. Bo!!ard (Gibbs & Hill) w/ottochment Mr. J. Beck (TUGCO) w/ottochment Mr. J. Redding (TUGCO) w/ottochment N,]
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N Mr. W.G. Couricil October 16,1985 e2 ATTACHMENT A Mechanical Doto Requested in Letter 84056.078
Subject:
Process Radiation Monitors
References:
Ltr 84056.078 Dated 8/l/85 Communications Report Dated 6/27/85 Mechanical Rll f/2 information Needs: Provide o copy of OEl-Tl83 which is referenced on the ICD for 1-RE-4509 as the documentation for removing the control function from this instrument. Also provide any other design change paperwork ossociated with this modification.
Subject:
Setpaint Calculation
References:
Ltr 84056.078 Dated 8/l/85 Communications Report Dated 6/27/85 Information Needs: Provide o copy of the setpoint calculation for the portial open position of CCW volve l-HV-4572 on the outlet of the RHR heat exchanger on receipt of an "5" signol. If a criculation does not exist, then provide design basis and criteria for this volve position.
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Subject:
Volve Sizing Calculations
References:
Ltr 84056.078 Dated 8/l/85 Communications Report Dated 6/27/85 Informotion Needs: Provide copies of the sizing calculations and design basis for the copocity of the CCW surge tank vent volve and the relief volve. Provide the design basis for the capacity of the surge tank vacuum breaker specified by G&H but supplied by the tank manufacturer. Also provide copies of any proposed or incorporated changes in the size or capacity of these volves.
Subject:
Separation Criterio
References:
Ltr 84056.078 Dated 8/l/85 Communications Report Dated 6/27/85 Information Needs: Provide o copy of the mechanical equipment separation criterio that applies to CPSES. The requirements for instrument sensing line separation are of prime interest. Also provide any applicable installation instructions or specificctions which oddress mechanical separation.
Subject:
Se! point Criterio (g"Zerences:
Ltr 84056.078 Dated 8/l/85 Communications Report Dated 6/27/85 l
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Mr. W.G. Coukil
. October 16,1985 e3 ATTACHMENT A Mechanical Data Requested in Letter 84056.078 information Needs: Provide the design basis for the pressure setting of the CCW pump discharge prasure switches, PS-4518 and PS-4519, used in the setpoint calculation for these instruments.
How does this compare to the system flow calculation,229-15, and the pump curve?
Subject:
Volve Specification Data
References:
Ltr 84056.078 Dated 8/l/85 Communications Report Dated 6/27/85 Information Needs: Provide justification for volves HV-4572 and HV-4574 being specified with on int::t pressure of 135 psig and a shutoff delto-p of 120 psi.
Additional Data Requests
Subject:
CCW Surge Tank P'"
' Terences:
G&H Calculation 229-12 (d
Mechanical RIL #7 Information Needs: Provide the design basis and criteria that was used to size the CCW surge tank so that it could accommodate leakage from components that the CCW system serves. Specifically address inflov from ruptured heat exchanger tubes in the system served. Also provide the basis for the 10 psig design pressure of the tank.
Subject:
Class 5 Piping
References:
Ltr 84056.023 Dated 8/21/84 Mechanical RIL #3 Information Needs: Provide the criteria used to determine if Class 5 piping is seismically analyzed. How is seismically analyzed Class 5 piping identified such that it is distinguishable from Class 5 piping that is only seismically supported?
Subject:
Thermal Barrier Rupture
References:
Ltr 84056.010 Dated 7/30/84 Ltr 84056.023 Dated 8/21/84 Ltr CPPA-40961 Dated 9/18/84 f)'
Ltr 84056.032 Dated 10/9/84 V
Ltr 84056.035 Dated 10/22/84 Communications Report Dated 5/10/85
Mr. W.G. Council October 16,'1985 P ge 4 (i
ATTACHMENT A Mechanical Data Requested in Letter 84056.078 (Morshall/Redding of TUGCO and Williams /Hess of Cygno)
Mechanical RIL #5 Informntion Needs: Provide o copy of the 50.55e report that was to be submitted to the NRC (per CPPA-40961) in relation to the rupture of the reactor coolant pump thermal barrier and the failure cf its ossociated single isolation volve. If the report is not available, provide justification for the acceptability of the existing design. (Reference Communication Report)
Subject:
Single Failure Criterio
References:
Transcript of Cygna-NRC Meeting Dated 5/21/85 Mechanical Rll #9 Information Needs: Provide the design basis for the CCW surge tank relief volve, vent volve, and vacuum breaker ccmbination for meeting the NRC single failure criterio.
Subject:
Orifoce Sizing
References:
Cygno Phase IV Checklist MS-06 Transcript of Cygna-NRC Meeting Dated 5/21/85 Information Needs: Provide o description of how flow balancing orifice sizing dato is transferred frcm G&H to the CPSES site and orifice supplier.
Provide the governing procedure (s) and examples of the transmittal documents.
Subject:
Hozords Analysis
References:
Ltr 84056.010 Dated 7/30/84 Ltr 84056.023 Dated 8/21/84 Mechanical RIL #4 Information Needs:
Provide the procedures which govern the documenting, tracking, and corrective action for discrepancies in the hozords protection oreo.
This should include discrepancies in items such as fire doors and barriers, missile shields, flood protection components, and other items which may not be safety-related in themselves but provide protection for safety-r loted components and systems.
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