ML18023B371
| ML18023B371 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 03/15/1976 |
| From: | Curtis N Pennsylvania Power & Light Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18023B371 (12) | |
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U.S. NUCLEAR REGULATORY C
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.NRC DISTRIBUTION FDR PART 50 DOCKET MATERIAL FILE NUMBER TO:
NRC FROM'A PENNSYLVANIA POWER
& LIGHT
.CO.......
ALLENTOWN PA
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DATE OF DOCUMENT DATE RECEIVED
~- I1-"t4 LETTER ORIGINAL OCOP Y CINOTORIZED QUNC LASS IF I E D PROP INPUT FORM NUMBER OF COPIES RECEIVED
"'l5 DESCRIPTION kTIUE'OUR 12-10-,75. LTR AND"'THEIR P-14-76 SUBMITTAL..........TRANS THE FOLLOWING........
ENCLOSURE RESPONSES TO NRC REQUEST FOR.INFO,QTD 12-10-75 ADD'L IN/0 ON COMP()NENTS."IN'SUPPRESS.XON POOL W/ATTCH DRAWINGS g ~
PLANT NAm! QQ aCPuE.H,WA+
I SAFETY ASSIGNED AD
%fAH CHWEtl PROJECT MANAGER; ICo SST ENVXRO 8"
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ASSIGNED AD !
BRANCH CHIEF PROJECT
?'IANAGER !
LIC ASST FOR ACTION/INFORMATION G PILE NRC PDR I &E GOSSICK & STAFF ASE PROJECT MANAGEMENT BOYD P
COLLXNS HOUSTON INTERNALD EN INEER N KNIGHT SIHWEIL PAWLICKI REACTOR SAFETY ROSS NOVAK ROSZTOCZY ISTRI BUTION BENAROYA IPPOLITO OPERATING REACTORS STELLO OPERATING TECH EISENHUT SHAO BAER SCHWENCER ERNST ALLARD SPANGLER SITE TECH GAMMILL STEPP HULMAN SITE ANALYSIS VOLIkIER BUNCH J ~ COLLINS PETERSON MELTZ HELTEMES SKOVHOLT LPDR'IC NS ASLB N FIG FORM 196 2-76 SE CHECK AT & I SALTZMAN RUTBERG EXTERNAL DISTRIBUTION NATL LAB REG. V-IE LA PDR CONSULTANTS GRAVIES SITE SAFETY & ENVIR ANALYSIS DENTON & MULLER BROOKHAVEN NATL LAB ULRXKSON(ORNL)
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TWO NORTH NINTH STREET, ALLENTOWN, PA. 18101 PHONEc (215) 821-5151 March 15, 1976 4
n Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555
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Docket Nos.
50-387 and 50-388 ATTENTION:
Dr. Walter R. Butler, Chief Light Water Reactors Branch 1-2 FILES 840-2, 172 SUSQUEHANNA STEAM 'ELECTRIC STATION ADDITIONAL INFORMATION ON COMPONENTS IN SUPPRESSION POOL ER 100450 PLA-108
Dear Dr. Butler:
On December 10, 1975, you requested additional information on piping and.
components located. in the suppression pool.
On January 14, 1976, we sent you our schedule indicating that this information would be provided. by March 15, 1976.
Consequently, we have enclosed. fifteen copies of our responses to"your request for additional information.
Very truly yours, N.
W. Curtis Vice President-Engineering 8 Construction WEB'AAW jf Jl
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8 L I GH T COMPANY
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Responses to NRC Request for Information dated December 10 1975 1.
Provide a list of piping and mechanical components which could be sub)ected to suppression pool hydrodynamic loadings or loadings from operation of the primary system pressure relief valves, including detailed drawings and functional description of such piping and components.
A list of all piping and. mechanical components in the suppression chamber is attached.
It includes a description of the function of each item and. reference to the appropriate drawings.
The following drawings are included:
8856-M-25-3 8856-M-25-8 8856-M-27-1 8856-M-27-2 8856-M-27-3 8856-M-28-1 8856-M-28-2 8856-M-28-3 Rev.
8 5
7 7
12 9
8 5
8856-M-28-9 Rev.
4 8856-M-29-1 7
8856-M-29-3 4
8856-M-157 1
8856-M-242 6
8856-M-247 4
8856-C-157 3
2.
Provide a description of methods and procedures used. to define the pool dynamic loads and relief valve actuation loads acting on the listed piping and components.
In September 1975 General Electric and Sargent and Lundy )ointly published NEDO-21061 and NEDE-21061-P entitled Dynamic Forcing Function Information Report (DFFR).
The DFFR provides methods and. procedures for predicting potential LOCA hydrodynamic and MSRV discharge loads.
Further definition of these loads will be obtained, through the Mark II Containment Long Range Program.
3.
Provide a description of methods and procedures, either by analysis or by testing, being used to ensure design adequacy of the listed piping and components under pool dynamic loads or relief valve actuation loads.
The Susquehanna suppression chamber piping and components will be designed.
according to the requirements of the applicable codes as described. in the Safety Analysis Report and the applicable portions of the DFFR.
Since the piping and other internal components hre not on the critical path for construction, their design has not been finalized.
The piping and components will be relocated.',where possible to minimize the effects of the dynamic loads.
We do not anticipate any testing to establish adequacy of the piping and components under pool dynamic or relief valve actuation loads.
4.
Provide a description regarding how the pool dynamic loads or valve actuation loads are being concurrently considered and combined with other operation or accident loads acting on the listed piping and components.
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Page 2
A discussion of load combinations is given in the DFFR.
As the design of piping and. components is finalized, a complete and detailed analysis of>
the load, combinations will confirm that the maximum stresses will not exceed the allowable stress limits.
This analysis will be included in the FSAR.
5.
Identify design limits used for the listed piping and components under pool dynamic or relief valve actuation loads.
If analysis or testing has been
- done, a summary of analysis or testing results and their comparison with design limits should. be provided. If analysis or testing has not yet been done, a description of the future program to perform such testing or analysis should. be provided.
As discussed, in answer to Question 3 above, the piping and. components willbe designed to the limits specified in the applicable codes as described in the Safety Analysis Report.
Piping and components will be relocated where possible to remove them from the pool swell zone.
Preliminary analyses indicate that the piping can be adequately supported to, withstand the pool dynamic and relief valve actuation loads.
SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 2
SUPPRESSION CHANBER PIPING
& EQUIPMENT Piping Line No.
Quantity Function Reference Drawing 18" HBD-185 10" HBB-120 21" HBB-110 RHR Pump full flow test RHR relief valve dis-charges RHR pump suctions 8856-M-25-2, tl-27-2 8856-N-28-2, M-29-2 885'6 N 28 lr M 28 9g tl-29-1 6"-HBD-186 16"-HBB-104 10"-HBD-183 4"-HBD-183 12"-HBB-101 6"-HBB-102 2"-HBB-114 2
RHR pump min. flow by-pass Core Spray pump suc-tions Core Spray full flow test lines Core Spray pump. min.
flow bypasses RCIC turbine exhaust RCIC pump suction RCIC pump min. flow by-pass 8856-M-28-2, M-29-2 8856-M-25-1, M-27-1 8856-N-25-1, M-27-1 8856-M-25-1, hl-27-1 8856-N-28-1, M-28-9 8856 M 28 lg N'28 9g tl-28-2 8856-M-28-2 2"-HBB-101 2"-HBB-101 16"-HBB-109 3"-HBB-108 24"-HBB-108 HPCI turbine exhaust 8856 h'l 28 2I hl 28 8 I N-28-1 RCIC Turbine Exhaust Vent 8856-M-28-2 RCIC vacuum pump discharge 8856-M-28-2 HPCI pump suction 8856-M-28-1, t4-28-9 HPCI turbine exhaust vent 8856-M-28-2
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a Piping Line No.
Quantity Function Reference Drawing 4"-HBB-133 12"-GBC-101 6"-GBB-120 1"-JCD-115 1"-JCD-115 1"-JCD-115 16 76 I
HPCI pump min.,Slow.
bypass MSRV discharge lines
~.i Suppression Chamber Spray Inst.
Gas to Primary Copntainment Vacuum Relief Valves Leak Chase piping Inst.
Gas to leak chase piping 8856-M-28-2 8856 M 25 1 g M 27 1 g M-28-'1, M-29-1, M-25-8 8856 M 25 3g M 27 3g M-28-3, M-29-3 M-25-8 8856-M-157.
8856-C-298, M-157 8856-M-157 Equipment No.
lF037-A,B,C,D 1F-402-AB Primary Containment Vacuum Relief Valves HPCI suction strainer 8856-M-27-3,= M-29-3 8856-M-28-9 1F 404 A~BgCgD 1F 407'08'09' 410-A,B Core Spray suction Strainers RHR suction strainers 8856-M-25-8 8856-M-28-9 1F-401-A,B 1F-013 16 RCIC suction strainers 8856-M-29-9 MSRV discharge quenchers 8856-M-25-8 E-404-A,B 87 Downcomer Vents Containment Hydrogen Recombiners 8856-M-252, M-247 8856-M-242
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