ML20214U283
| ML20214U283 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 06/01/1987 |
| From: | Papanic G YANKEE ATOMIC ELECTRIC CO. |
| To: | Mckenna E NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM), Office of Nuclear Reactor Regulation |
| References | |
| TASK-03-06, TASK-3-6, TASK-RR FYR-87-056, FYR-87-56, NUDOCS 8706110123 | |
| Download: ML20214U283 (13) | |
Text
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Telephone (617) 872 8100 TWX 7t0-380-7619 YANKEE ATOMIC ELECTRIC COMPANY
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a
.. b 1671 Worcestor Road. Framingham, Massachusetts 01701 June 1, 1987 FYR 87-056 United States Nuclear Regulatory Commlosion Document Control Dock Washington, DC 20555 Attention!
Ms. Elloon McKenna, Project Manager Project Directorato 1-3 Divlelon of Roactor Projecto 1/11 Hoferencoat (a) Licenso No. DPR-3 (Docket No. 50-29)
(b) Lotter from USNRC to YAEC (NYR 87-79), dated Apell 27, 1987
Subject:
SEP Topic III-6, Commitment Summary Daar Ms. McKenna As you requestod during our mooting on April 14, 1987, Yankoo han prepared the attached nummarion of colomic-related engineering and plant modifications to be completed following lonuanco of the SER.
Thono engincoring tacks and plant modificationo ronult from our mutual evaluations of the columic capacity of safo shutdown nyotem structurce and components within Yankoo Nuclear Power Station (YNPS).
Yankoo han otroady completed many aclamic analyana and plant modifications. The activities lloted in tho attachmento constituto all of the work romalning to completo SEP Topic 111-6 for YNPS.
Dotalled doacriptions of both completod and pending engincoring and modifLentions have already boon docketed.
It to our intention to perform those activitlos after tho staff han losund the definitivo solomLc safety evaluation report for YNPS.
Furthermore, those commitments are banod on our curront understanding of the staff's dlopooltlon of thcon solomic related lacuno.
Significant chanson in the final runolution of thono lacuno may noconaltato our completo re-ovaluation of thono commitmento.
Vnry truly youro, g10601 N EE AT0H1 ELECTRIC COMPANY O 06th 0000%2.9 g
,,gy g
. Papan c, Jr.
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Contor Project Enginnor p(
Llconuing i
CP/sj Attachmonto cci USNRC Region !
USNRC Healdont Inspector. YNPS
r ATTACHMENT 1 Summary of Engineerina and Plant Modifications Renalning to Complete SEP Tople III-6 1.
Analyze and design seismic supports for the Main Steam and Feedwater (MS/FW) piping outsido containment. ModLfy, as necessary, the support structure and the nonroturn valve onclosure for selsmLc loads.
Qualify the MS/FW vapor contalnar penetrations for the selsmic loads based on the now Soll-Structure Interaction (SSI) model with horizontal soil springs. Nucinar Regulatory Commission (NRC) site-specific spectra and the associated detailed MS/FW critoria will be used.
2.
Analyzo and design soismle supports for largo and small bor. Safe Shutdown System (SSS) piping insido containment. A detailed work scope, based on the results of our AprL1 13-14 meeting, is presented in.
3.
Install solemic supports for the food apt blood haat exchangers, and the concreto block wall surrounding them insico tho s.rantalnmont. ThLa is the only block wall insido containment. The NMC spectra will be used.
4.
Add bracing to the logs of the component cooling surge tank in the upper level pAB. The NRC spectra will be used.
5.
Install soismLc modifications to the Dlosol Conerator Bullding including now diagonal bracing.
Modify two existing structural stool connections to solemtenity decouple the pAB and DCB.
6.
Install solsmic modifications to the pAB structural stool framo. This butiding has boon subjected to confirmatory analysis using NRC spectra.
The Column C-8 connection and boam-to-shoar wall connections will be rodosigned using the now Hilti catalog with a saf aty factor of 4.0 for concreto expansion bolts. The NHC spectra wl11 be used.
1.
Analyzo and design sotamic supports for all large and small born SSS piping outsido containment. NHC alto-specLfic spectra and the associated DC-1, Revision 4, celtoria will be used.
A detailed workscopo, based on the results of our April 13 and 14,1981 mooting, is presented in.
8.
Investigato the Noutron Shlald Tank (NST) support mechanlam to dolormine the potential for movement of the roactor pressuro vossal under the NRC spectra solumic load.
If nocessary, design a support modifLcation to procludo such motion.
It has provlously boon demonstrated that the NST wlL1 not allde under Yankoo Compontto Spoetra (YCS) scismic loads.
l 9.
Rosolvo tho issue of potentini solemically-induced dynamic uplift loads l
on tho steam generator support logs. Thoso londs are based on the NMC l
spoetra. Mlther of two solutions will be employed. Tho gap in the i
support logo hold down mechanlam will be adjustod to a maximum of l
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ATTACHMENT 1 (continued)
Summary of Engineering or plant Modifications Romaining to Complete SEP Topic III-6 1/8 inch. The second alternative in to perform a timo history, or other conventional analysis, which demonstrates that no olomont of the support mechanism, including the Lubrito platos, is overstressed.
10.
The noismic evaluation of SSS conduit, cable trays, and miscellaneous mechanical / electrical equipment will be performod through the resolution of USI A-46 utilizing SQUG. The NRC.tpoetra will be used in the Generic Imp 11montation plan.
Any noconnary plant modifications will be made in conjunction with that program.
11.
Two additional structural steel members will be added to support the upper lovel north block wall of the PAD. Those will be designed to romain clastic under NHC spoetra loads.
A thorough walkdown of the plant will be performed to confirm that all block wallo which could affect SSS compononto have boon identiflod. This walkdown will conform to the requiremonto of IRB 80-11.
If any now wallo are identified by this walkdown, they will be analyzod and modifiod no noconnary.
If now structural stool is nooded it will be donigned to remain clastic under NHC upoetra Londo.
In lieu of Nhc loads, twico YCS loads may be unod.
12.
An investigation will be performod to determino if the strap anchors in the north wall of the pAB are solidly grouted.
If not, then grout will be added or another acceptable structural solution will be implomonted.
13.
All U-bolto used as axial rootraints on piping will bo included in the In-Sorvice Inspection program.
14.
IN Information Notico 86-94 regarding 1/2-inch diamator Hilti Bolts will be addronced through normal plant procedurco for thono noticos.
i 15.
The offect of lateral columic loads on vertical-only nmall boro pipo supports will be ovaluated.
Support modif1 cations will be mado if noconnary. Displacements banod on either the NRC opoetra or twice the YCS spectra will be unod.
16.
Now ampliflod roopongo opoetra will be sonorated for the vapor container using the most recontly developed coil springs and the NHC opoetra.
i l
11.
The Snismic Houvaluation and Hotrofit critoria Document, DC-1, j
Hovinton 4, Will bo revised no followns a.
On page 11, the reference to 20 KSF ultimato 0011 bouring capacity for the VC and HSD wl11 bo doloted. The foundation analyson for those structuros have boon ronolved on a caso by casa bacio.
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ATTACHMENT 1 (continued)
Summary of Engineering or Plant Modifications Remaining to Complete SEP Topic III-6
- 18. On May 22, the staff requested that all piping problems qualified to YCS be checked to the NRC spectra levels. Specifically, the request was made to double the YCS seismic stresses on piping and compare to the NRC spectra level allowable. Strain criteria, per DC-1, Revision 4. may be used. Also, it was requested that concreto expansion anchors in the affected piping system supports be checked to ensure that they have a minimum safety factor of 4.0 under twice the YCS load. The NRC has stated that bolts with a safety factor greater than 2.0 are acceptable on an interim basis. These two checks will be performed on all piping systems identified with an asterisk (*) in the left-hand margin on.
In lieu of this check, each system may be analyzed using the NRC spectra with the DC-1, Revision 4, criteria.
Buried piping and Dedicated Safe Shutdown System piping in the PAB have been found acceptable by the staff and are excluded from this commitment.
If the piping resolution strategy involves developing "new YCS SAMs and inertia" forces, the soll strain parameters and soil-structure model used to generate these values will be submitted to the staff for their review. This review has already been completed for the NRC spectra.
19.
In the future, major modifications to existing SSS piping systems and new i
SSS piping systems will be designed to DC-1, Revision 4 criteria using NRC spectra.
1
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$TTACHMENT 2 Based on our meeting of Apell 13-14, 1987, the two remaining technical questions in the piping t. coa concern U-bolto and gang supports for small boro pipe. Yankee will employ one of the following resolution strategios for each issue.
A.
Use of U-Bolts _as Axial Rostrainto Any one of the following three options are considered acceptable to justify the use of U-bolto as axial restraints:
1.
Uso existing tost data from outaldo sources to corroborato the allowables determined in the YNPS analysod.
2.
Daviso and forform a test program to corrobosute the calculated I
allowables.
3.
Replace U-botto.
In addition, it was agrood that an IS1 program would bo implemented in association with Options 1 and 2 to check U-bolt proload on a regular basis (Attachmont 1, Item 13).
[
H.
Small Hore piping _Cang Support Deolan_Critorie Doolgn loads from nonsolomic 11nco attached to colomic gang supporto shall be determined by one of the following four methodo:
1.
Hoesure the span tonsth of the nonnotamic lino, take the tributary woight on tho gang support x peak ANS x 1.5 and use this value as the support load.
i l
2.
perform noismic analyson of the nonsciamic lines and una resulting support loads.
3.
Compare solemic and nonnoinmic linen.
Demonstrate that geometric almilarity is sufficient to justify uno of the support loado from the analysis of the calamic line.
4.
perform dynamic analyson of a reprocontative complo of nonnolumic linee to justify using cupport londo from the analysis of the scismic lino.
I The following table providon the current status of all largo and small boro SSS piping.
Nach system analysin has boon categorimod no olthere adoquato as ist adequato with specific changeal or to be analyzed to DC-1. Havinton 4, t
critoria.
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Picinz StALuS Pinin2 Systes Des criot ien /Botmda ries Status / Resolution Straterv
- ain Steam Lines Piping from SG to VC Penetration for 4 Loops loops 1 and 4: Reanalyze Inside VC using new YCS SAMs and inertia.
(Problems COL to Loops 2 and 3: Reanalyze for YCS C04) using DC-1, Revision 4, criteria and new YCS SAh, and inertia.
Main Steam Lines Piping from VC to Anchor A-50 on MS/FW Will be analyzed using DC-1, from VC to Anchor Support Structure for 4 loops Revision 4, criteria with h"dC A-50 spectra.
Main Steam Lines Piping from Anchor A-50 to Turbine Generator Not part of SSS. Will be Beyond Anchor for 4 Loops analyzed to ensure integrity of A-50 adjoining piping.
l
- Eoiler Feed Piping from SG to VC Penetration 4 Loops loops I and 4: Reanalyze Discharge Line using new YCS SAMs and inertia.
Inside VC Ioops 2 and 3: Reanalyze for YCS (Problems 021 to using DC-1, Revision 4, criteria 024) and new YCS SAMs and inertia.
Boiler Feed Piping from VC to Turbine Building Not part of SSS. Will be Discharge from Penetration analyzed using DC-1, Revision 4, VC to Turbice criteria with NRC spectra.
Building Main Coolant MCL Piping for 4 loops OK per confirmatory analysis.
Piping Pressurizer PZR Safety and Relief Piping OK per current analysis to NRC l
Safety and spectra.
Relief Piping Safety Injection MCL Tap-Off to VC Penetration 4 Loops OK with reanalysis using NRC Piping (Problems spectra with DC-1, Revision 4 201 and 207) criteria.
I
Pleine Status Pirine Syste-Descritticn/Boe daries Status / Resolution Straterv i
- Shutdown Cooling MCL Tap-Off to VC Penetrations OK with reanalysis using new YCS Piping (Problems SAMs and inertias.
121 and 122) l Main Coolant VC to Low Pressure Surge Tank in PAB Will be analyzed to DC-1, Bleed fro:n VC Revision 4, with NRC spectra.
I to LPST
- Feed and Bleed 3/4" DRH-2502-14 from Hx Cross-Connect OK with reanalysis using the Hx, Charging.
Piping, 3/4" DRH-2502-17 from 2" CRCH-2502-3, following modeling:
l Safety Injection 3/4" DRH-2502-18 fro:2 8" PRSH-2502-6, all to a) Model in portion of Drains (SP-FB-5)
Drain Header 2" DRH-2502-1 8" PRSH-2502-6.
(Reference Drawing 9699-FP-44E) b) Use VC spectra @ connection to 2" DRH-2502-1 (new YCS l
spectra).
c) consider rotational and translational SAMs.
I d) Use 100% SAMs.
e) Model in 2" CRCH-2502-3.
l
- RC Loop Safety 1" BEL-302-2, 3, and 4 from Bypass Line to OK per current analysis.
Valve Discharge Cla=p Anchor for 3 Loops (SP-RCL-17 to 19)
(Reference Drawing 9699-FP-38E)
- Loop 4 Safety 1" BRL-302-5 from Loop 4 Bypass Line OK with reanalysis using the Valve Discharge (5" CRB-2502-4) to 6" BRL-302-6, following:
and Charging 1" BRL-302-9, 2" CRCH-2502-4 from a) Use 100% SAM.
Relief 20" CRM-2504-10 to HI-E-8-4, 1" CRCH-2502-4 b) Include 3/4" DRH-2502-19 in (SP-RCL-20) fros 2" CRCH-2502-4 to 1-1/4" CRB-2502-6, model.
l 1-1/4" CRB-2502-6 from RC Loop 2 to PIR, c) Use VC SAM and inertia for l
3/4" DEH-2502-19 from 2" CRCH-2502-4 Past 6" BRL tap-off (new YCS Sam l
Support DRH-R-13 and inertia).
(Reference Drawing 9699-FP-10) d) Insure 6" BRL-302-6 rigidity near tap-off.
i
- Pressurizer Included Above Included in " Loop 4 safety valve Spray discharge and relief" piping.
l (SP-PIR-7) 1 l
l
f Pinine Status i
Pinine Swstant neecrintion/h==Amelan Statine /s..alut i on Stem & mew
- Charging and included Above Included in " Loop 4 safety valve Auxiliary discharge and relief" piping.
Pressurizer Spray (SP-CH-3)
- Charging Through Charging Line from HI-E-8-1, to VC Included with feed and bleed Drainbox Penetration 2" CRCH-2502-3 Hx, charging, SI drains.
(SP-CH-2)
(Reference Drawing 9699-FP-44E)
- Pressurizer 3/4" CRM-2502-5 to 3/4" CRU-2502-5 to OK th reanalysis using new Sample and Vent Capillary Tubes, 1" VRH-2502-1 to Support YCS SAMs and inertia using 100%
VRH-H-1 SAMs.
- Hot and Cold Les Drain Line from all 4 Loops. P2R Drain, and OK with reanalysis using 100%
Drain Drain Header (SP-RCL-9 to 16, SP-PZR-1, and SP-DRM-1)
- Charging and 3/4" CRSH-2502-3 from 2" CRBH-2502-1 Included with " bleed lines from Bleed Drain and 1/2" CRCH-2502-1, 3/4" DRH-2502-19 from Hx."
HP Sample Sample Cooler to 2" DRH-2502-19 (Drain (SP-CH-lab)
(Reference Drawing 9699-FP-44E)
- Stea:2 Generator Blowdown and Auxiliary W Lines from 8" W OK with reanalysis which Blowdown and SC to VC Penetration generates ARS for connections to (SP-SG-9 to 12 8" diameter feedwater line, and uses 100% SAM, and new YCS SANs SP-BD-1) and inertia.
Pleine Status Pinine Syste-Descriotion Bgundaries Status Resolution Straterv To Hx 2" CRBH-2502-1 from HI-E-8-4 to Loop 1 OK with rentalysis which Cold Leg incorporates the following:
(Reference Drawing 9699-FP-44E) a) Include 3/4" CRSH-2502-3 to Bleed Lines sample cooler and drain header to and from (2" DRH-2502-1).
Rx b) Use VC inertia O connections (SP-FB-2ab to drain header (new VC and spectra).
From Hx 2" CRBH-2502-2 from IM-E-8-1 to OK with reanalysis which 3" CRBH-2502-4, 3" CRBH-2502-4 to incorporates 3/4" bleed line flow VC Penetration, 1-1/2" CRBH-2502-3, 5 lines using new YCS ARS and (Reference Drawing 9699-FK-11F, PI-1061)
SAMs.
- RC Pu=p Pump Vents for 4 Loops OK per current analysis.
Vents (Reference Drawing 9699-FP-1E) j (SP-RCL-1 to 4)
- RC Loop Pu=p Vents for 4 Loops OK per current analysis.
Bypass Vents (Reference Drawing 9699-FP-1E)
(SP-RCL-5 j
to 8)
I
- Steam Drains for 4 SGs OK per current analysis.
I Generator (Reference Drawing 9699-FP-26F)
Drains (SP-SG-1 to 4)
- Steam 3/4" VRH-2502-2, 3, 4, and 8 from SG WP OK per current analysis, j
Generator to Anchors i
Vents (Reference Drawings 9699-FP-48D, 48E)
(SP-SG-5 to 8) i l
f l
l Pipine System Desceletion/ Boundaries Status / Resolution Straterv
- Pressurizer 1/2" diameter from PZR to Transmitter PR-LT-6 OK per current analysis.
Narrow Range (Reference Drawing 9699-FK-11G)
Level (SP-PZR-4)
- Pressurizer Line from PZR to Transmitters PR-PT-6 and OK per current analysis.
Pressure PR-PT-711 (SP-PZR-5)
(Reference Drawing 9699-FK-11G)
- Feed and Bleed 3/4" VRH-2502-10 from Hx Cross-Connect OK with reanalysis which models Hx Vents Piping to Anchor VRH-RH-1 in cross-connect piping, and new (SP-FB-3ab)
(Reference Drawing 9699-FP-48D)
YCS SAMs and inertia.
- Bleed Line See " Bleed Line from Hx" See " Bleed Line from Hx."
Flow (SP-FB-4)
- Reactor and Vent Lines to PZR and Rx Heads OK per current analysis.
l Pressurizer Vent
- RC Loop Pressure Instrumentation Tubing from SI Tie-Ins to Will be analyzed using DC-1, Instrunentation Transmitters SI-PT-1, 2, 3, 4, Revision 4, criteria and new Tubing MC-PT-100, 200, 300 YCS SAMs and inertia.
(Reference Drawing 9699-FK-11D, 11E) l
- RC Loop See "RC Loop Instrumentation Tubing" Above Will be analyzed using DC-1, l
Instrumentation Revision 4, criteria and new l
Tubing YCS SAMs and inertia.
l (SP-RCL-22) l l
- LTOP See "RC Loop Instrumentation Tubing" Will be analyzed using DC-1 Instrumentation Revision 4, criteria and new Tubing YCS SAMs and inertia.
l (SP-RCL-23)
y
-r Ploine Status Pipine System Descriotion/ Boundaries Status / Resolution Straterv
- Steam Piping from SG to Transmitters, 4 Loops OK per current analysis.
Generator (Reference Drawing 9699-FK-11J)
Wide Range Level Reference Leg (SP-SG-13 to 16)
- Steam Piping from SG to Transmitters, 4 Loops OK per current analysis.
Generator (Reference Drawing 9699-FK-11H)
Wide Range Level Variable Leg (SP-SG-17 to 20)
- Steam 3/4" CRM-2502-13, 14, 15, and 16 from SGs OK per current analysis.
Generator to Transmitters Differential (Reference Drawing 9699-FK-11K)
Pressure Flow (SP-SG-21abc)
- Steam SG to Transmitters Will be analyzed to DC-1, Generator Revision 4, criteria, with Narrow Range new YCS SAMs and inertia.
Level (SP-SG-22)
- Pressurizer Line from PZR to Transmitters PR-LT-8, OK per current analysis.
Wide Range PR-LT-9, and PR-LT-705 Level (Reference Drawing 9699-FP-38F)
- - - y
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,;;'_g fi',,
Pinina Status c
Pinine Syntam DescrinElon/ununAnelen Stitue/nmnolution
? ~
"I Strategy
- Bleed Piping Outside,VC-VC Penetration to LCV-222 OK per current analysis.
VC Penetration to LCV-222 7
i Charging outside VC Will be analyzed using DC-1, Piping - VC Revision 4, c51teria with,NRC Penetration to spectra.
Valve Room
~
Fire Piping Outside VC" Will be analyzed using DC-1, TK-55 Nozzle Revision 4, criteria with NRC to Isolation spectra.
J' Valve
~
Primary Vent-Outside VC, Will be analyred using DC-1,.
^
T Piping - VC Revision 4, criteria with NRC Penetration to spectra.
Valve Room Steam Drain outside VC Will be analyzed using DC-1, Piping - NRV Revision 4, criteria with NRC Area to Auxiliary spectra.
Boiler Room s -
j
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Steam Generator Outside VC Will be analyzed using DC-1, Blowdown - VC
_f Revision 4,1 criteria with NRC Penetration to spectra.
TV-401A, B, C, and D Emergency Boller Outside VC Will be analyzed using DC-1, Feed' Blowdown Revision 4, criteria with NRC Header to First spectra.
Check Valve Auxiliary Steam Outside VC Will be analyzed using DC-1, Piping NRV Area Revision 4, criteria.
to TV-406 c.
Pinine Status Pinine System Descrintion/Boundacien Status / Resolution Stratany
- Make-Up Pump New DSSS Piping.in SSS Building, PAB, OK per current analysis.
Discharge Piping and Buried Piping to PAB
- Make-Up Pump New DSSS Piping in SSS Building OK per current analysis.
Recirculation Piping
- Make-Up Pump New DSSS Piping in SSS Building and Buried OK per current analysis.
Suction Piping Piping to Fire Tank Fuel Oil Piping
' Buried Piping from Diesel to Fuel Tank OK por current analysis.