ML18344A284
| ML18344A284 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 06/24/1975 |
| From: | Sewell R Consumers Power Co |
| To: | James Keppler NRC/IE, NRC/RGN-III |
| References | |
| AO-4-75 | |
| Download: ML18344A284 (40) | |
Text
/
Mr. James G. Keppler Region Director Office of Inspection Region III US Nuclear Regi..tl.atory 799 Roosevelt Road Glen Ellyn, IL 60137
Dear Mr. Keppler:
- ,.\\,,...
Docket 50-255
-- License DRP-20 Palisades Plant A0-4-75 Pipe Restraints By letter dated April 25, 1975, your staff req_uested that we provide a description of the scope and extent of the engineering evalu-ati.on of pipe hangers and restraints that was performed by our Palisades Plant Architect Engine~r- (A-E).
This report is enclosed.
A number of deficiencies have been observed and corrected which apparently occurred during initial construction and subseq_uent modification of the plant.
- These deficiencies may have involved non-uniform application of designated criteria, incomplete review of in-stalled systems, and incomplete documentation and follow-up prior to and after turnover.
Since this design and construction work was per-formed, significant changes in our Construction Quality Assurance Services program have been instituted.
Our Quality Assurance Services group has reviewed the seismic restraint deficiencies and has concluded that the present QA programs and procedures are adequate to detect the types of deficiencies observed, should they recur.
Some of the deficiencies may have been related to the start-up and hot functional testing program; however, since this program was con-ducted at the Palisades Plant, significant changes have been made.
Our General Office plant start-up organization has reviewed the seismic restraint deficiencies with respect to their preoperational test procedure development program and has concluded that our current procedures are such that similar deficiencies are not likely to occur in the future.
A number of deficiencies could have been detected and corrected through a preventive maintenance program for pipe hangers and restraints.
We have begun the development of such a program, and plan to have it in effect by about August 1, 1975.
r:--
Mr. James G. Ke..
er Docket 50-255 License DPR-20 June 24, 1975 2
It is possible that some of the deficiencies resulted from inadequate maintenance procedures.
While we have not been able to find any documentary evidence of this and consider it unlikely, we are cur-rently developing improvements to our present procedures and expect these improvements to be completed by about August 1, 1975.
DAB/ds CC:
Division of Reactor Licensing Yours very truly, Ralph B. Sewell Nuclear Licensing Administrator
PIPING SUPPORT SYSTEMS REVIEW PALISADES PLANT COVERT, MICHIGAN CONSUMERS POWER COMPANY Bechtel Job 10512-021 Bechtel Associates Professional Corporation Ann Arbor Michigan 20 June 1975 l
Text Appendix - A Appendix - B Appendix - C CONTENTS Piping Support Systems Review Criteria for Physical Limits of Piping Systems.Review Physical Limits of *Piping Systems Review Support/Restraint Work Items Description 1
I
P.ALISADES PLANT PIPING SUPPORT SYSTEMS REVIEW
- 1.
Summary During May, 1974, a pipe restraint on the suction line of the low-pressure safety injection pump was pulled loose from its mounting.
Th~s event was reported by CPCo as abnormal occurrence (74-08).
The cause was apparently water hammer.
Although calculations proved the restraint to be adequate for the design basis earthquake ("DBE"): load, CPCo requested a review of the as-installed piping support systems in certain seismic Class I systems.
The review of the piping support systems in the Seismic Class I systems listed in Appendix A and Appendix B has been completed.
This review of the piping support systems included a physical survey of the as-installed support systems for compliance with the initial design and criteria in the Palisades FSAR
- During the review, it was determined that certain work was advisable to insure compliance with the support systems design and criteria, and because there was insufficient time to perform*a further analysis in order to determine whether or not many of the work items were actually required.
The work items were identified,. appropriate ma.terial was pr.ocured and
.installation was completed prior to the end of March, 1975.
Nevertheless, the engineering opinion was that there was no significant safety problem and that the functional integrity of the piping systems would have been preserved in the event of a DBE.
An identification and description of these work items is contained in Appendix C to this report and is summarized below
- e cility Base Plant Piping Change Piping "C
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- 5.
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2 TOTAL 85 13 48 6
5 9
19 1
2 188 -
The restraints added were of the rigid type, anchored to either concrete or existing structural steel members, and having U-bolt clamps or steel framing* around the piping.
Some of the work items consisted of maintenance and upgrading type activitiE7s such as adjusting U-bolts, adding shims and other minor work..
Subsequent to the review and completion of the work items, further analyses have been performed and it has been determined that 74 of the 188 work items were not required to meet the.Palisades FSAR criteria of not exceeding 110% of the piping material yield stress under DBE loads. It is believed that additional analyses would demonstrate that *there were additional work items performed as part of the review which were not required.
- 2.
Discussion A.
Basis for Systems to be Reviewed The basis for the determination of the piping systems to be reviewed consisted of the identification of.those systems required to ensure the functional integrity of the shutdown cooling piping system for normal shutdown and of the Engineered Safeguards Systems piping systems, in the event of a design basis earthquake
- The physical limits of each piping system included in the review included the system itself an.a each oranch-connection* through the ffrsf-*restraint
~.
beyond a remote operable or accessible manual isolation valve.
The basic piping systems or portions of systems included in the review are listed below and are delineated in Appendix A and Appendix B to this report:
a)
High and Low Pressure Safety Injection Systems inside and outside containment (P&ID M-201, 202, 203, 204, 210, 221).
b)
Critical Service Water System inside and outs~de containment through isolatable branch connections (P&ID M-208, 213).
c)
Component Cooling Water System outside' containment (P&ID M-209).
d)
Charging System (P&ID M-201, 202).
e)
Concentrated Boric Acid System (P&ID M~202).
f)
Air Room Purge and Containment Air Purge outside containment (P&ID M-218)
- g)
Containment Spray (P&ID M-203, 204).
h)
CVCS letdown system through flow control.valves (P&ID M-201, 202).
i)
Fuel oil to the emergency diesels (P&ID M-214, 655, 653).
j)
Connections to the p~imary coolan~ loop through the isolation valves (P&ID M-201).
k)
Auxiliary Feedwater System (P&ID M-207, 220).
- 1)
Gas decay tank connections (P&ID M-211).
m)
Diesel Generator Auxiliary Systems (P&ID M-214).
n)
High pressure air'~ to the safeguard valves (P&ID M-225).
Portions of the piping systems.shown on the associated P&ID's,but not included in the review,were excluded because they are: not necessary to the functioning of the shutdown sooling systems or the Engineered Safeguards Systems *
.~.....
Each of the as-installed piping *systems, or portions of systems, encircled on t*he attached P&ID' s.were physically observed to determine where support work was advisable.
As part of this review, the acceptability of the location *and type of all piping support components including spring supports, rigid supports, guides and hydraulic snubbers for thermal, dead.
weight and seismic loads.was confirmed. (Estimated total in excess of 2700).
Spring hanger settings were not reviewed, but the work described herein would not significantly change the settings on.existing spring suppor~s.
B.
Basis for Piping Support Systems Evaluation The basis for the evaluation of the as-installed support systems was as follows:
The base plant calculations, drawings or criteria were used in physically determining where the as-installed support systems differed from the initial criteria.
- 1)
Piping 6" and larger:
The base plant calculations and drawings provided the location of seismic restraints to ensure t*hat the piping primary stress levels would.not exceed 110% of the material minimum yield stress at temperatures under DBE load condition.. The restraints were designed so that the structural member maximum stress levels would not exceed 60%
of the material yield stress.
- 2)
Piping 4" and smaller:
The base plant design criteria provided for the physical location of supports at such intervals that, for a particular pipe size, the natural-frequency would be approximately equal t~ or greater tha~ 20 CPS for design in the rigid range.
These criteria were followed in the small piping systems review and in the definition'of the work items.
- ~-*
Where the as-installed support systems differed from the design criteria, engineering judgments were made during the review to determine whether the support could be accepted, as,is, or whether a specific restraint should be added, deleted, replaced or modifi'ed to insure compliance with the 20 CPS criteria.
- 3.
Conclusion The piping systems review described in this repor~ included all piping support components in the systems required for safe shutdown.
The Appendices to this report delineate the work items accomplished.
The engineering opin_ion that adequate functional integrity of the piping systems would have.been maintained during a* des_ign basis earthquake, even if the work items had not been performed, is based upon the following:
The majority of the work was on small piping, 4" and under.
Modified dynamic analyses and other evaluations were completed and acceptable stress levels calculated subsequent to the accomplishment of the work items.
(less than 110% of S assuming that the work items had y
not been done.
These analyses have confirmed that a significant number of work items were not required to meet the Palisades maximum stress level criteria.
The modified dynamic analysis utilized has been submitted to NRC as part of Bechtel's Topical Report BP-TOP-1.
The topical report is in' the final stages of NRC acceptance review
- In addition to the modified dynamic analysis. performed, a number of the work items accomplished are considered as upgrading to (1) improve the restraint/support condition; (2) minimize the potential for vibration; (3). add conservatism in JD.Odifying single directional restraints to multi-directional restraints. (Unistrut Corp. has recently confirmed that their product is. suit.able for carrying the imposed loads in all directions.)
Although the engineering opinion was that there was no significant safety problem a~d that the functional integrity of the piping systems would have been preserved in the event of a DBE, completion of the identified work items has provided further assurance that the shutdown cooling and ESS piping system restraints are in conformance with and in some cases exceed, the Palisades FSAR criteria.
The major portion of design and construction of the Palisades base plant took place in the late 1960's.
Due to our limited knowledge of start-up and hot functional testing, certain changes in the plant and the operation of the plant, it is impossible for us to determine the
- cause for each specific work item.
However, they generally appear to be due to the following:
- 1.
During the recent piping support systems review, numerous relatively simple devices, such as U-bolts, were added on small pipe piping systems on the basis of the rigid design in areas where it could not readily be determined that they were necessary, inasmuch as the performance of a further analysis to confirm that they were not required would have 1:unnecessarily delayed start-up of the plant.
As indicated above, the subsequent analysis has confirmed that the majority of these work items were not required.
(74 of 188)
- 2.
Subsequent to completion of base plant design and constr~ction, certain Seismic Class I piping systems were added, expanded or modified without uniform application of the designated criteria for restraints.
(20 of 188) 3..
Some devices which had been or appear to have been installed during base plant construction were subsequently removed and not replaced.
(13 of 188)
- 4.
Some of the adjustments and minor modifications, such as the adding or replacement of shims and replacement or adjustment of nuts and bolts, were ordinary maintenance type items which could have been routinely identified and corrected.
(11 of 188)
- 5.
Many of the work items consisted of corrections and adjustments to eliminate interferences that are typical of.the type items normally checked and corrected during a start-up and hot functional testing program.
(15 of 188)
- 6.
Other work items may have been the result of differences in engineering judgment between the engineer originally performing the design and the engineers performing the review; incomplete documentation and follow-up prior to and after turnover; late piping changes and modifications; lack of documentation of engineering approval of field changes in location from the original drawings; and an-incomplete check out of the installation of the restraints.
(68 of 188)
The 74 work items determined as not required in Item 1 above include approximately 13 in Items. 2, 3, 4, and 5.
- e.
The work items discussed in this report arose out of circumstances believed to be unique to Palisades.
As indicated, a number of the work items were subsequently determined not to be required, and others relate to facility modifications subsequent to the completion of plant design and construction, maintenance type items and the. replacement of restraints which had previously been installed and removed.
Start-up testing programs which are normally performed by Bechtel on other projects were performed at the Palisades Plant: by Consumers Power Company.
This procedure and the manner in which turnover was handled may have caused incomplete coordination of follow-up items.
Subsequent to the design and construction of the Palisades Plant, the application of seismic restraint.criteria by engineering and construction has become more formal and disciplined and has been subjected to extensive pr9cedural control.
In addition to the development of the procedural approaches to restraint work, quality control and quality assurance programs governing such work have evolved substantially from the Consumers/
Bechtel Quality Assurance program for Palisades, so that even if some of the underlying causes were to reoccur in spite of the programmatic and procedural developments, the Consumers/Bechtel QA program for Midland, or the Bechtel program in conjunction with the QA programs of other utilities have and will continue to provide for prompt identification and correction.
\\
APPENDIX A CRITERIA FOR PHYSICAL LIMITS OF PIPING SYSTEMS REVIEW P&ID M~201: Piping connections to the primary coolant loops out through the normally closed double isolation valves and connections to the ESS and shutdown cooling.
App. A The primary coolant loop piping was excluded because *all seismic restraints are engineered and built into the equipment supports.
P&ID M-202:
Piping systems for concentrated boric acid injection by the charging pumps and letdown throu~h the remote operable flow control valves, pumps and interconnecting piping.
All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-203:
Piping systems for LP injection, HP injectionJcontainment spray and connections on the safety injection tanks
- All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-204:
Piping systems for LP injection, RP injection and shutdown cooling.
Also included are the connections on the SIRW tank out through the first isolation valve. 1 All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-207:
Piping systems for the auxiliary feedwater system including main feedwater-and-main steam out through the i:solation valves.
All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-208:, Piping systems in the critical service water system supply to the ESS and shutdown cooling equipment, plus discharge water piping from air coolers through RCB wall to isolation valve.
Also included are branch connections to other services out through an isolation valve
- All other piping systems are excluded in that they are not necessary for operation of the ESS or.shutdown cooling systems.
1 of 3
App. A P&ID M-209:
Piping systems in the component cooling water system outside containment *. Also included are branch connections to non-essential equipment out through the first isolation valve.
All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-210:
Piping systems to the SIRW tank from the tank to the isolation valve (continuation from P&ID M-204).
- All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-211:
Piping systems from the gas decay tanks out to the first isolation valve.
All other piping systems are exlude.d in that they are not necessary for operation of the ESS or shutdown cooling systems.
P&ID M-213:
Piping systems in the critical service water system (continuation from P&ID M-208).
All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems
- P&ID M-214:
Auxiliary piping systems for the emergency diesel generators and emergency fuel oil supply to the diesels.
All other piping systems are excluded in that they are not necessary for operation of the ESS or shutdown cooling systems or they are an integral part of the diesel generators and have been seismic qualified by the supplier.
P&ID M-218:
Piping systems for the containment air purge from the containment penetration out through the containment isolation valves.
All other piping systems are excluded in that they are not necessary for the operation of the ESS or shutdown cooling systems.
P&ID N-220:
Piping systems from the condensate storage tank to the auxiliarr feedwater system (continuation from P&ID M-207).
All other piping systems are excluded in that they are not necessary for the operation of the ESS or shutdown cooling systems
- 2 of 3
App. A P&ID M-221:
Piping systems to the SIRW tank from the isolation valves to the tank (continuation from P&ID M-204)
- All other piping systems are excluded in that they are not necessary for the operation of the ESS or shu~down cooling systems.
P&ID M-225:
Piping systems in the HP air sup?lY to the ESS valve operators.
All other piping systems are excluded in that they are not necessary for the operation of the ESS or shutdown cooling systems.
P&ID M-653 & M-655:
Piping systems from the emergency fuel oil system out to* the first isolation valve (continuation from P&ID M-214).
All other piping systems are excluded in that they are not necessary for the operation of the ESS or shutdown cooling systems.
3 of 3
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4 s
2 3
4 s 6
2 J
4 2
3 4
5 2
3 7
11 12 13 14 15 S-Seismic W-'lleight T--Thermsl LINE CLASS &
SYSTEM SIZE NATURE BB-24-4" C.C.W. O/S CTMT to and MOD.
From ESS Pumps 3"
MOD.
3" NEW 3"
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llll-23-3" s.w. to ESS R.ooma Air
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CLRS 3"
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4" MOD.
4" NEW BB-23-2" s.w. to Air Compr. &
NEW Cont. Room A/C 2"
NEW 2"
NEW 2"
NEW 2"
NEW 2"
NEW 2"
NEW 2"
NEW V-Vibration 2
See Sheet 8
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TYPE SUPPORT s
s s
s s
s s s.
s s
s s
s s
s s
s s s s
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APPE!iDIX C SUPPORT/RESTRAINT WORK ITEMS DESCRIPTION WORK ITEMS DESCRIPTION Added 3X3X3/8 L, a U bolt & removed the rod hanger.
Added 3" L, plate and a U bolt to existing steel and removed the rod hanget.
Added 3" L, U bolt and welded to existing steEol.
Added U bolt and L to existing restraint for axial loads.
_Replaced clip with U bolt.
Replaced clip with U bolt.
Replaced clip with U bolt.
Added 4X4Xl/2 L, 2 U bolts & cinch anchors.
Cinch anchors and angle are common to other restraints. 598-J-J, 598-4-5, 598-6-J.
Added shims to reduce gaps.
Replaced clip with U bolt.
Added U bolt to existing steel for
. 598-2-5.
Added shims to reduce gaps.
Replaced clip with U bolt.
Replaced clip with U bolt.
Replaced clip with U bolt.
Added U bolt to existing steel for 598-2-5 Added 3X3X3/8 L, U bolt. Welded to existing st eel.
Added 3X3X3/8 L, U bolt.
Added 4X4xl/2 L, 2 U bolts for 2 pipes.
Welded to existing steel.
Added 3X3X3/8 L, 1 U bolt. Welded to existing steel.
Added 3X3X3/8 L, 1 U bolt. Welded to existing 'teel.
Added L, *u-bolt.
Added 4X4X3/8 L, 2 U bolts for 2 pipes.
Welded to existing steel.
Added 3X3X3/8 L, 3/8" plate, 2 U bolts for 2 pipes cinch anchors.
for Explanations ADDITIONAL ANALYSIS COMPLETED.
B2 B2 x
Bl x
B2 B3 x
B3 x
BJ x
Bl x
Bl x
BJ x
Bl x
Bl.
x BJ.
x BJ x
BJ x
Bl x
Bl Bl x
Bl Bl Bl Bl x
Bl x
Bl (F)~Resulting from Facility Change X-Analysis Completed Subsequent to Performing Work Items and Noted Work Items Were Not Required to Meet FSAR Criteria.
Palisades Plant Consumers l'ower Comp.any Job'No. 10512~021 Sheet 1 of 8 I
LINE DETAIL CLASS &
SYSTEM M-598-NO.
SIZE NATURE 6
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l 1/2" REPLACE s
l 1/2" REPLACE 9
2 GB-
-2" H.P. Air - ESS Rooms MAINT(F) 3 2"
NEW(F) 4 2"
NEW(F) 5 l 1/2 11 NEW(F) 6 l l/2" NEW(F) 7 1 1/2" NEW(F) 10 2
Cc-4-1" Primary Loop Drains lRELOCATE eves Letdown Line 3
3-211 NEil ll 2
BB-23-2" s.w. to Air Compressors N&l 3
2" N&l 4
2" MOD s
2" MOD l2 2
HB-23-2 11 s.w. to s.G. Test Coolers MOD(2) 3 2"
MOD 4
2" NEW
© TYPE SUPPORT s
s s s
s s
s s
s s
s s s s
s s s
s s
I.
s s
s s
APPENDIX C SUPPORT/RESTRAINT WORK ITEMS DESCRIPTION WORK ITEMS DESCRIPTION 3/8 I'.L,,3X3" L, l U l>olt, cinch anchors.
U bolt to existing steel for M-598-2-5.
3X3 L, l U bolt, welded to existing s*teel Added 4X4Xl/2 L, U bolt to existing steel.
Added 3X3X3/8 L, U bolt and removed rod I hanger.
Bl Bl Bl Bl B2 Added 3X3 L, 3/8" EL, 4 U bolts for 2 pipes.Bl Welded to existing steel.
Added 3X3" L, U bolt, welded to existing Bl steel.
Added 3X3" L, U bolt, welded to existing Bl steel.
Added 3X3" L,* U bolt, welded to existing Bl steel.
- Added 2 bolts to existing bracket; Bl,C4 Added 3" angle, 1 U bolt welded to Bl existing steel.
3/8 H., 3" angle, 2 U bolts.
Bl 3" angle, l U bolt, cinch anchors 3/8" H.
Bl 3" angle, l U bolt, welded to existing Bl steel.
3" angle, l U bolt, welded to existing s* l.Bl Added Pl., 3" angle, 2 U bolts to 2 pipes, Cl,5 cinch anchors.
Added 4" channel, 3" angle, l U bolt Bl welded to existing steel.
3" angle, 2 U bolts, plate and*cinch Bl anchors.
3" angle, 2 U bolts, plate and.cinch Bl anchors.
Added clevis and angle and replaced the C4 bent rod and.C-Clamp.
Add~d clevis and angle, removed C-Clamp.
C4 Added channel 611, 3" angle, 4 U bolts for B2 4 pipes, cinch anchors and plate. Re-I move rod hanger.
Added 2 U bolts to existing structure.
B2 3" angle, plate, cinch anchors, 4 U bolti Bl on 4 pipes.
G>
ADDITIONAL
. ANALYSIS.
COMPLETED x x x
x x
x x
x x
- }
ti{.
Palisades Plant Consumers Power Comp!!Jly Job No. 10512-021 Sheet 2 of 8
LINE DETAIL CLASS &
SYSTEM M-598-NO.
SIZE NATURE 13 2
CC-5-2" Charging Inlet to Loop MOD
2A'!
3 2"
NEW.
5 2"
MOD 14 2
BB-5-2" Critical F.O.-Piping NEW to D.G. Day Tanks 15 2
BC-l.5-1/2" Metering Pump Discharge NEW 3
1/2" NEW 4
1/2" Na4 5
1/2" Nrl4 6
1/2"
~
7 1/2"
~
8 1/2"
~
9 1/2"
~
10 1/2"
~(F) 16 2
BB-24-2" c.c.v. O/S CTMT-Surge NEW(F)
/
TK Line 3
2" NEW 4
2" NEW 17 2
CC-7-2"
.Charging Pumps to eves MCI>
and BPSI 3
2"
)!EPLACE 4
2"
)!EPLACE 5
2" NEW 6
2" MAINT.
7 2".
1'.'m 8
2"
- MAINT, 9
2" NEW 18 2
BC-3-18" SIRW Tank to ESS MQ) 19 2
BC-3-14" CTMT Spray Pump HA"
~PLACE Suction J
14"
~LACE 20 2
BC-l.5-1/2" Metering Pump Discharge i!EPLACE
<D TYPE SUPPOR' s
s T/W s
s s s
s s
s s s s
s s
s v
v v
v s
s v
v s
s s
s APPENDIX C SUPPORT/RESTRAINT WORK ITEMS DESCRIPTION WORK ITEMS DESCRIPTION Replaced existing strap with U bolt -
1/2" gap.
Cl,5 3" angle, U bolt, welded to existing steel.Bl Removed grating to relieve hanger rod Cl,5 interference.
Added L, plate, U bolt, cinch anchors.
Bl.
Added L, U bolt, clnch anchors.
Bl Added 3" L, plate, U bolt and cinch Bl anchors.
Added 311 L, plate, U bolt and cinch Bl anchors.
Added 3" L, plate, U bolt and cinch Bl anchors.
Added L, plate, 2 U bolts, cinch anchors.
Bl Added*L, plate, U bolt, cinch anchors.
Bl Added L, plate, U bolt, cinch anchors.
Bl Added L, plate, U bolt, cinch anchors.
Bl Added L, U bolt, cinch anchors.
Bl Added L, plate, U bolt, cinch anchors.
Bl.,4 Added L, cinch anchor, 4 U bolts
- 4 81,4 pipes.
Added L." 4 U bolts on 4 pipes and Bl,4 supported from the larger pipe.
Added 3/8" plate.
CJ Added 311 L, 5/8" plate, cinch anchors.
C3 Added J" L, 5/8" plate, cinch anchors.
CJ Added J" L, 5/8" plate, cinch anchors.
CJ Added.J/8" plate.
C4 Added J" L, 5/8" plate, cinch anchors.
Bl Tightened existing bolts and tack welded.
C4 Added 3" L, 5/8" plate, cinch anchors, C3 Added Shim plate to reduce gaps.
Al Added plate & clamp to existing anchor, Al Added plate & clamp to existing ancho:i::,
Al Added L, U bolt to existing steel.
Bl G>
ADDITIONAL ANALYSIS COMPLETED x
x x
x x
x
.x x x x I I I
Palisades Plant Consumers Power Company Job No. 10512-021 Sheet 3 of 8
LINE
© DETAIL CLASS &
SYSTEM
'l'YPE M-598-NO, SIZE NATURE SUPPORT n
2 cc-4-6" s.I. to Loop lB MOD s
22 2
BBD-8-10" c.c.w. to Radw. Evapora-MOD(F) s tors 23 2
BC-20-3" SIR'll TK Piping to & from n>D s
eves 24 2
BB-24-1" C.C.'11. O/S CTMT to &
NEW s
from*Miac. Equipment 3
2" l\\ELOCATE s
4 2";1 1/2" MOD s
s 2";1 1/2" MOD s
6 2";1 1/2" MOD s
- 7.
2";1 1/2" MOD s
25 2
DC-1-6" BPSI Inside CTMT MAINT.
T/'11 26 I
2 HC-7-3" CVCS-Boric Acid Supply NEW s
27 2
GC.. 1-12" S.I,T.-82C to Loop 2A MAINT.
s 28 2
BB-24.-3/4" C.C.W. O/S-Chemical Add NEW(F) s Tank Piping CTMT Spray Pump Discharge 29 2
GC-3-B" CTMT Spray.~JllllP Discharge MOD s
3 8"
REMOVE T
4 B"
REMOVE T
30 2
llB-5-1 11 Critical*F.O.-D.G. "A0
~
s 31 2
HB-22-1" D.G. "A"-Jacket Water Nm s
3 l"
M(j) s 4
l" Hal s
s l"
RELOCATJ s
32 2
- GC-1-3" BPSI Discharge O/S CTMT REPLACE s
3 3"
REPLACE s
4 6"
Hal s
33 2
GC-1-10" L.P.S.I. Pump Discharge MAINT.
s
~------------------
~.
APPENDIXC SUPPORT/RESTRAINT wilRK ITEMS DESCRIPTION WORK ITEMS DESCRIPTION Removed spring to make it a rigid rod hanger.
Added U bolt to existing assembly.
Provided 1/16" clearance.
Added L, plate, 2 U bolts for 2 pipes, cinch anchors,
Added L and U bolt to existing steel.
Interference existed previously, Added L, plate, cinch anchors.
Added L, plate, cinch anchors.
Added L, plate, cinch anchors.
Added L, plate, cinch anchors.
Install bolt in 6" clamp.
Added L, U bolt and cinch anchors.
Tightened turnbuckle and jam nut.
Added clamp to 14." pipe to support 3/4" pipe and 2 U bolts.
Added ~hims to reduce ~aps.
Removed temp. horizontal guide.
Removed temp, horizontal guide.
Added L, plate, cinch anchors, 2 U bolts on 2 pipes, Added L,plate, U bolt, cinch anchors.
Added L, 2 U bolts on 2 pipes.
Added L and U bolt to existing restraint.
Added L, plates, cinch anchors.
Restraint was attached to equipment.
Added plates to existing pipe whip restraint.
Added plates to existing pipe whip restraint, Added plates to existing pipe whip restraint.
Replaced bent channel.
Al Bl Cl,5 Bl C4 B2 B2 B2 B2 C4*,5 B2 C4 B2 Al C2 C2 Bl B1-B2 Bl C3 Al Al Al C4 G>
ADDITIONAL ANALYSIS COMPLETED x
x x
x x
x x
x x x I
Palisades Plant Consumers Powe~ Company Job No. 10512-021 Sheet 4 of 8
LINE
(!)
DETAIL CLASS &
SYSTEM TYPE K-598-NO, SIZE NATURE SUPP OR 34 2
GC-1-8" Shutdown Cooling HX'S NEW s '
to CTMT Spray 35 2
cc-9-3" Pressurizer Spray Line NEW s
(Loop 2.A).
3 3"
MOD T
36 2*
CC-6-6" Redundant HPSI NEW s
37 2
BB-24-16" c.c.w. at llX MAINT. -
38 2
BC-23-6" SIRW Tank Recirc.
NEW s
39 2
cc-9-3" Pressurizer Spray Line NEW w
(Loop lB) 4 3"
NEW(F)
S/T 5
3" NEW(F)
S/T 40 2
DC-2-2" S.I. Recirc. to S,I.R.W REPLACE s
Tank 3
2" REPLACE s
41 2
GC-9-1".
S,I, Tanks Vents & Drains NEW(4) s 3
l" NEW s
4 l"
MOD s
5 l"
NEW s
6 l"
NEW s
42 2
GC-9-3" Pressurizer Spray Lines NEW s
3 4"
NEW S/T 4
4" NEW S/T
.5 4"
NEW S/T 6
3" NEW
.S/T 7
3" NEW S/T 8
4" MOD s
43 2
BB-20-1" Gaseous Radwaste l\\'EW s
3 l"
NEW s
4 l"
NEW s
44 2
HB-5-1" Critical F.0.-D.G. "B" NEW s
45 2
JB-22-1" D.G. "B"-Jacket Water RELOCAT s
APPEh1lIX C SUPPORT/RESTBAINT WORK ITEMS DESCRIPTION WORK ITEMS DESCRIPTION Added Channel, plate, cinch anchors.
Welded to existing clamp on pipe.
Added L and cinch anchors.
Provided l" gap in the U bolt.
Added plates to pipe whip restraint.
Removed existing temporary support.
Added plate, L's, cinch anchors.
Added bracket.
Added L, plate, u bolt.
Added L, plate, U bolt.
Added L, welded to existing steel, 2 u bolts on each of 2 pipes.
Added L and U bolt to existing steel, Added L, plate, U bolts.
Added L, U bolt, cinch anchors.
Added L and l" U bolt to existing restraint for axial loads.
Added L, U bolt, welded to existing steel.
Added L and U bolt, Added L's, welded to existing steel.
Added L, U bolt, welded to steel.
Added plate, L's, cinch anchor, U bolt.
Al A2 Cl,5 Al C4
.u C2,5 C2 C2 Bl Bl Bl Bl B2 Bl Bl C2 C2 C2 Added U bolt to existing frame for 2 pipes.CZ Added L, plates, cinch anchors, U bolt.
C2 Added L and U bolt to existing steel."
C2 Replaced U bolt and provided 1/16" gap_.
Cl,5 Added L, U bolt, cinch anchors.
Bl Added L, plate, U bolt, cinch anchors.
Bl Added L, U bolt, cinch anchors.
Bl.
Added L, plate, cinch anchors, 2 U bolts Bl to 2 pipes.
Added L, U bolt, plate, cinch anchors *.
CJ Restraint was attached to equipment.
ADDITl:ONAL ANALYSIS COMPLETED x
x x
x x x x
x Palisadea Plant Consumers Power Company Job No. 10512-021 Sheet 5 of 8
LINE
<D DETAIL CLASS &
SYSTEM TYPE K-598-HO.
SIZE NATURE SUPPORl 45 3
JB-22-1";3/4" D.G. "B"-Jacket Water RELOCATE s
4 3/4" NEW s
s 3/4" NEW s
46 2
llBC-35-1" Gaseous Radwaste NEW(F) s 3
l" NEW(F) s 4
l" NEW(F) s s
l" NEW(F) s 6
l" NEW(F) s 47 2
BC-20-3" S.I.R.W. Tanlt to eves NEW s
48 2
BB-24-1" e.e.w. O/S CTMT to &
NEW s
from Gas Compr.
3 l"
NEW s
4 l"
NEW s
5 l"
NEW s
6 1/2" MOD s
7 l"
MOD s
8 1/2" MOD s
9 l"
MOD s
49 2
BB-50-3/4"(1")
D.G, "A"-Starting Air MOD s
3 3/4"(1")
NEW s
4 JB-24-1 1/2" NEW s
so 2
BC-1-4" SIRW Tank Piping NEW s
3 4;2' NEW s
4 Be-1-3" NEW s
BC-23-3" 51 2
CC-3-2".
eves NEW s
52 2
BB-24-10" c.e.ll. Return from CTMT MOD s
53 2
BB-24-10" c.c.w. O/S CTMT to FPC MAINT.
3 14" MAINT.
s 54 2
BB-23-6" S.W. to D.G.
MOD s
l APPENDIXC SUPPORT/RES' ** :AINT WORK ITEMS DESCRIPTION WORK ITEMS DESCRIPnON Added L, U bolt, plate, cinch anchors.
Restraint was attached to equipment*
Added L, U bolt to existing steel.
Added L, plate, cinch anchors, U bolt.
Added L, plate, cinch anchors, 2 U bolts.
Added L, plate, cinch anchors, 1 U bolt.
Added L, plate, cinch anchors, 2 U bolts on 2 pipes.
Added L, cinch anchors, 3 U bolts for 3 pipes.
Added L, plate, cinch anchors, 2 U bolts Added L, plate, cinch anchors, 1 U bolt.
Added L, U bolt, welded to exi.sting channel.
Added L, U bolt, welded to existing channel.
Added L, U bolt, welded to existing channel.
Added L, U bolt, cinch anchors.
Removed clip. Added U bolt.
Removed clip. Added U bolt.
Removed clip. Added U bolt *.
Removed clip. Added U bolt.
Removed clip. Added U bolt.
Added L, 2 plates, cinch anchors, U bolt Added 3X3X3/8 L.
Added L, plate, cinch anchors and U bolt Added L, plate, cinch anchors, 2 U bolts for 2 p:l.pes.
Added L, plate, cinch anchors, 2 U bolts for 2 pipes.
Added L and U bolt.
Changed spring hanger to rod.
Add 10" clamp.
Removed 14" clamp.
Tightened bolts on the pipe clamp.
Added angle.
ADDITIONAL ANALYSIS COMPLETED C3 x
Bl x
B2 x
Bl Bl x
Bl Bl x
Bl Bl x
Bl x
Bl x
Bl Bl B3 x
Bl x
B3 x
B3 x
B3 x
Bl B2
- Bl x
Bl Bl Bl x
Al C4,S e4 x
Al l J I
I i I I
' I Palisades l'lant Consumers Power Company Job No. 10512-021 Sheet 6 of 8 I
LINE Q)
DETAIL CLASS &
SYSTEM TYPE M-598-NO.
SIZE NATURE SUPPORl 55 2
GC-1-12" LPSI REPLACE s
56 2
BCC-102-2" Iodine Removal & NAOH Make-Up to HC-3-24" NEW(F) s 57 2
cc-4-1" SI Tank Drain REMOVE T
3 l"
REMOVE T
4 l"
REMOVE T
5 l"
NEW s
58 2
CC-4-1" SI Tank Drain REMOVE T
3 l"
MOD T
59 2
3 l"
MOD T
60' 2
61 2
BB-24-1 1/2" C.C.W. to & from MOD s
Charging Pumps 3
l" MOD s
4 l"
NEW s
5 l"
MOD s
6 l"
NEW s
62 2
BB-24-1" C.C.W. Chem. & Recirc, NEW s
3 l"
NEW s
63 2
BCC-123-1" Gas Compressor Diach.
NEW(F) s 3
l" NEW(F) s 4
2"-1" NEW(F) s 5
l" MAINT(F) s 64 2
HB-23-2" s.w. to Contr. Rm. A/C NEW s
65 2
JB-24-1 1/2" D.G. "B"-Starting Air Nm s
3 BB-50-3/4" Nm s
4 3/4" MCI) s 66 2
HB-5-3" CQ,tical F.O. Recirc.
MAINT.
S/W Line APPENDIX C SUPPORT/RESTRAINT WORK ITEMS DESCRIPTION WORK ITEMS DESCRIPTION Added angle, cinch anchors.
Added plates, cinch anchors & U bolt.
Removed bracket.
Removed U bolt.
Removed U bolt.
Added L, plate, U bolt.
Removed U bolt.
Provided gap in U bolt.
Provided gap in U bolt.
Provided gap in U bolt.
Added plate and removed clip.
Added L, plates, 4 U bolts on 2 pipes.
Added L, cinch anchors, plate, 2 U bolts to 2 pipes.
Added plate and U bolt to existing restraint.
Added plate, cinch anchors, L & U bolt to existing restraint.
Added angle, plate, U bolts to 2 pipes.
Added angle, U bolt welded to existing steel.
Added angle, U bolt, welded to existing steel.
Added angle, U bolt, cinch anchors
- Added angle, U bolt, welded to existing liteel.
Added angle, plate, cinch anchors, 2 U bolts for 2 pipes.
Welded existing plate to steel.
Added L, 3 U bolts to 3 pipes, welded to existing steel.
Added L, U bolt and welded to existing steel.
I Added L, U bolt, plate and cinch anchors.
Added U bolt, removed clip.
I Adjust nuts on hanger rod.
I Al Bl Cl,5 Cl,5 Cl,5 Bl Cl,5 Cl,5 cl.5 Cl,5 Cl,5 Bl Bl Bl Bl Bl Bl Bl Bl Bl.
Bl Bl,C4 Bl Bl Bl B3 C4 ADDITIONAL ANALYSIS COMPLETED x
x x
x Palisades Plant Consumers Power Company Job No. 10512-021 Sheet 7 of 8 I
.alisades Plant _
Consumers Power Company APPENDIX C SUPPORT/RESTRAINT WORK ITEMS DESCRIPTION Job *No. 10512-02.1 Sheet 8 of 8 A
The initial design was based on a dynamic analysis ~ith "the piping system maximum primary stress levels not to exceed 1.1 SY in the event of a DBE.
Al The initial calculated pipe stress approached S, therefore the original restraint design was considered nece~sXry to prevent the piping from exceeding 1.1 SY.
Without the original restraint, it did not appear that Su would have been exceeded.
~
A2 With the original restraint design, the initial calculated pipe stress was below S and the original restraint design was installed.
Because of the margin below Sy, a reanalysis of. the system may show that the work item was.not necessary to prevent the piping system from exceeding 1.1 S.
y B
The initial design was based on a calculated restraint spacing to maintain the pipe system in the rigid range with a natural frequency of equal to or greater than 20 cps.
Bl The calculated restraint span was adhered to.
B2 A single direction restraint was changed to a multi-:-direction restraint.
The existing restraint may have beeri adequate
- B3 Uni-strut pipe clamp suitable for sjngle direction and possibly multi-direction was changed to a U-bolt design for multi-direction restraint.
(The existing uni-strut clamps have subsequently been confirmed by the manufacturer as suitable for multi-directional restraints).
B4 Alternate modified dynamic analysis or engineering judgement have indicated that. the work item may not be necessary to maintain pipe stress below 1.1 SY.
It is belieyed that a detail stress analysis, rat,her than 20 cps criteria, would show that stress levels would be below 1.1 Sy even if the work item had not been done.
C Existing restraints or supports were modif1ed, relocat.ed, or removed based on conservative engineering judgement.
Cl To provide additional clearance for pipe thermal growth.
C2 To minimize the potential of local stress concentrations.
C3 To minimize the potential for vibration.
C4 Minor maintenance or upgrading type work was done to improve the restraint/
support condition.
C5 This work item is typical of the type item normally checked and corrected during start-up and hot functional testing
- Sy..,. Minimum yield stress Su - Ultimate stress
-*,.