ML18081A481
| ML18081A481 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 10/30/1979 |
| From: | Librizzi F Public Service Enterprise Group |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7911050347 | |
| Download: ML18081A481 (2) | |
Text
PS~G Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /430-7000 Mr. Albert Schwencer, Chief Operating Reactors Branch #1 October 30, 1979 U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Schwencer:
STEAM GENERATOR WATER HAMMER SALEM GENERATING STATION UNIT NO. 1 DOCKET NO. 50-272 In lieu of performing a test to demonstrate that a water hammer problem does not exist on Salem Unit No.
l~ we have performed an investigation of the applicability of the tests conducted at the Trojan and Indian Point 2 plants.
The attached table lists the comparison of Salem to Trojan and Indian Point in the areas of concern and shows that Salem is very similar to Trojan with the exception that Salem has thickei walled feedwater piping.
Indian Point No. 2 steam generator and feedwater piping, although not identical because of the unit size, is similar in the critical areas of the sparger, nozzle, and loop seals.
Based on this study and the Indian Point and Trojan test results which showed the absence of a water hammer problem, we believe that no water hammer test is required on Salerri Unit No. 1.
Com-mitments have been made on the Salem Unit No. 2 Docket (50-311) to perform a water hammer test on that unit.
The test will be performed after bore load and if the re~ults show the need for design or procedural modifications, those modifications will al so be made *to Salem Unit No. 1.
If you should need any additional information on this subject, please feel free to contact us.
Attachment rno:J-mts Very truly yours, Frank P. Librizzi General Manager -
Electric Production 7911050347 95-2001 (200M) 2-78
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PARAHBTBRS COMPARBD SG Model J tube size Ste-J tube numbers Generator Sparger size D1-nsiona Salem 1 Trojan IP 2 salem 2 of Pirat
_ l_l __
A 21 __
2_1 _
horizontal run 12 B
22 22 from iG wall 13 c
23 23 to start of 14 D
24 24 loop seal Loop seal if any l'eedwater pipe Pipe aize size, thicknsaa Ii Pipe wall Ii ID.
-terial Pipe Material&
Motor Driven Pump Auxiliary Matro Driven Pump Peedwater Turbine Driven Pump Diesel Driven Pump Water Hamner test if any done sG rate of rise restriction imposed at pre11ent Reference a i'l'BJIM GBNBRATOR COMPARiiON SAUIM, TROJAN AND INDIAN POINT OCT. 30, 1979 * '
PSB&G PGB CON BDI'l'XON PiB&G ii J
SALBM - 1
-~T..,
INDIAN POIN'l' 2 iALBM 2 lU!MAR6 51 51 44 51 2*
2*
2" 2*
35 35 35 35 10" 10" 10" 10" Trojan, drawing no.
2.656' 2.746' 2.656' M-102 Rev. 4 2.65?'
2.746 1 2.20*
2.656' IP-2 drawing 1~583 1
2.746' 2.656 1 A 190541-2 2.656'.
2.746' 2.656' ialem Isometrics No numbers Bach iG ~onfiguration*
Bach SG configuration Only SG 22* ha11 a loop ia.e as ialea 1
- SG feedwater piping consists of a bend down-consists of a 90° elbow seal consisting of a which suffered hammer ward.Vertical drop of 1.75' downward.Vertical drop 450 elbow.Vertical drop damage on 13 Kov.
73 of 2.4' of 1.4' 14" Sch. BO 14" Sch. 60 lB" Sch. BO 14" sch. BO All~able stresses at o.11so*, 12.so*
0.594", 12.Bl2" 0.93B", 16.124"
- o. 750*, 12. SO*
650 P ANiI 831.l, 1977 A 106 Grade C A 106 Grade B A 106 Grade C A 106 Grade C A 106 Grade B - 15 ICiI A 106 Grade c - 17.S ICiI 440 gpm 400 gpm 440 gplll
- Presently adding
-440 gpm 400 gpm 440 gpm one lOO* motor driven BBO gpm BBO gpm*
BOO gpm BBO gpm pump BBO gpm*
Done with "J" tube and Done with "J" tube PSB&G has C<lllllllitted Not Done loop seal.installation installation and loop to conduct a test.
with ring header drain seal installation of iG 22 time of 1 minute to 30
- cing header. orain t:i.e minutes with one test used is 10 minutes.
after 120 minutes.
Rate of SG level rise Limit AUX. Peed Plow to should be less than 1.2*
None 150 gpm if AP Flow is N/A per lllinute.
not initiated within 5 minutes after loss of Peedwater.
PGB submittjfts to NRC IP-2 submitt111s to NRC dated Aug. 6, 75, Oct.
dated Aug 30, 74. NRC 21, 75 Ii JUly 12, 75 review of results dated JUly 79.