ML20058C530
| ML20058C530 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 06/21/1982 |
| From: | Downing J, Tuttle D, Zahorsky J CROSBY VALVE & GAGE CO. |
| To: | |
| Shared Package | |
| ML20058C478 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.D.1, TASK-TM 3983, NUDOCS 8207260373 | |
| Download: ML20058C530 (8) | |
Text
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CROSBY V A LV E S GAGE COMPANY C Fi O S B Y J
WRENTHAM, MASS T
REPORT No. 3983 VALVE COMPARISON BETh'EEN A 3M 6 HCU-65 SPEC. SAFETY VALVE AND A 3M 6 HC-75 SAFETY VALVE 2
2 CROSBY F.O. NO. 24467 VALVE MANUFACTURER:
CROSBY VALVE 6 GAGE COMPANY k'RENTHAM, MASSACHUSETTS REQUESTED BY:
CONSUMERS P0k'ER COMPANY JACKSON, MISSISSIPPI PREPARED BY: _
W 4 f.?s" F L J
Ok'NING Ab_0CIATE ENGIN R REVIEk'ED hY: 3. 6. h y
J P2 D. E. TUITLE FROJECT ENGINEER f
APPROVED BY: 'e ~ 0.'/ N1 '2 ;['
d [2 h Kf.Ol'ORSKY YllEF NGINEER - 5.'ETY VALVES DATE:
JUNE 21, 1982 D2072bO373 820722 PDR ADOCK 05000155 P
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CROSBY V A LV E B GAGE COMPANY CROSBY J
WRENTHAM, MASS T
Report No. 3983 Page 2 1.
Introduction 1.1 This report will compare the Crosby 3M 6 HCU-65 Spec. Safety Valves, Assembly 2
l Number 48697 Mod. 2, installed at Dairyland Power with the Crosby 3M,6 HC-75 Safety Valves, Assembly Number 43864, installed at Consumers Power Big Rock Point Plant.
1.2 The following areas will be addressed:
1.2.1 Comparison of valve orifice areas and valve inlet and outlet sizes and flange ratings.
1.2.2 Conparison of valve materials.
1.2.3 Comparison of valve internals (nozzle, nozzle ring, disc insert, disc holder, guide and guide ring).
Report any dimensional differences that would have an effect on valve performance.
Comparisons on actual drawing dimensions which are propriatory will not be reported by physi-cal dimension but differences, if any, will be noted.
1.2.4 Comparison of valve set pressures and springs.
1.2.5 Ccmparison of any differences in design features that could cause a difference in valve performance.
1.3 Incidental valve parts (cap, lever, spindle nut, studs, nuts, etc. ) that have no effect on valve performance will not be considered.
2.
Comparisons 2.1 A comparison of valve inlet and outlet sizes and flange ratings is shown in Figure 1.
2.2 A comparison of valve materials as the valve was supplied by Crosby is shown in the following tabulation.
Dairyland Power Consumers Power Assy. No. 49697 Mod 2 Assy. No. 43864 3M,,6 HCU-65 Spec.
3M 6 HC-75 9
Part Name
- Material Raterial Body Chrome Moly Steel ASTM Cast Carbon Steel A-217 GR-WC-6 ASUI A-216 WCB Nozzle Stainless Steel 19-9-DL Stainless Steel 19-9-DL Nozzle Ring 316 SST 316 SST
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CROSBY V A LV E 8 GAGE COMPANY C F1 O S B Y J
WRENTHAM, WASS T
Report No. 3983 Page 3 2.
Cocparisons (Continued) 2.2 (Continued)
Dairlyand Power Consumers Power Assy. No. 49697 Mod 2 Assy. No. 43864 3M 6 HCU-65 Spec.
3M 6 HC-75 2
2 Part Name Material Material Disc Holder 316L SST Stellited Lands Cast "S" Monel Disc Bushing 440-C SST 440-C SST Bellows 316 SST N/A Bellows Adaptor 316L SST N/A Disc Insert
- 17-4 PH AISI 651 Stainless Steel 19-9-DL Guide Nicoloy Nicoloy Guide Bearing N/A Bearium Guide Ring 316 SST 316 SST Spindle Point 416 SST Monel Spring Washer Steel Steel Adjusting Bolt 416 SST 416 SST Adjusting Bolt Aligner Bearium B-10 Bearium B-10 Bonnet Cast Carbon Steel Cast Carbon Steel 1
l Spring X-1669 Carbon Steel (Carbon Steel) See l
Discussion on Spring
- Material of disc insert was changed in the field, material was originally stcinless steel 19-9-DL.
Any material dif ference noted will have no derogatory effect on the valve per-formance.
2.3 There are no dimensional differences in the valve control area, which include the nozzle, nozzle ring, disc insert, disc holder, guide and guide ring. The two (2) valve assemblies, under similar conditions (No. 48697 Mod. 2 and No.
43864) will perform identically.
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wRENTHAM, MASS r
Report No. 3983 Page 4 2.
Comparisons (Continued) 2.4 The follewing is a list of set pressures and ring settings for the two (2) valve assemblies as supplied.
Please note that more than one (1) valve may be set at any of the set pressures:
Dairyland Power 3M,6 HCU-65 Spec. Safety Valves Assembl9 No. 48697 Mod. 2 Safety Relief Valve Set Pressure Identification No.
Spring Number psig N.R.
G.R.
62-27-001 1669 1390
-9
+25 62-27-002 1669 1426
-8
+15 62-27-003 1669 1426
-8
+15 62-27-009 1669 1390
-8
+15 Consumers Power 3M,6 HC-75 Safety Valves Assembl9 No. 43864 Safety Valve Set Pressure Pressure Set Identificatica No.
- Spring Number psig N.R.
G.R.
Pressure (psig)*
RV-5000 1669 1237
-7
+7 RV-5001 1669 1247
-7
+7 1565 RV-5002 1669 1257
-7
+7 1545 RV-5003 1669 1268
-7
+7 1588 RV-5045 1669 1278
-7
+7 1575 RV-5056 1669 1288
-7
+7 1535
- Set pressures of Consumers Power Safety Valves are presently not as supplied and sprfng changes were cade in the field.
The nozzle ring and guide ring settings of the Dairyland Safety Valve No.
62-27-009 were adjusted during tests performed at Wyle Laboratory - the new ring positions are:
Nozzle ring (-18) and Guide ring (-10).
- 2. 5 The significant difference in the valve designs (excluding inlet and outlet flange ratings) is the inclusion of a bellows in the 3M,6 HCU-65 Spec. Safety Relie f Valve.
(The effects of this on valve performancs can be minimal due to the spring selection).
3.
Safety Valve Springs 3.1 The spring used in the 3M 6 HC-75 Safety Valve (Assembly No. 43864) for Con-9 suoers Power Big Rock Poi 5t Plant is based upon the valve set pressure and is critical for proper valve operation of the saf ety valve.
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r CROSBY V A LV E 8 GAGE COMPANY CROSBY j
WRENTHAM, WASS T
Report No. 3983 Page 5 3.
Safety valve Springs 3.2 Crosby Spring No. 1673 presently installed in the 3M,6 HC-75 Safety Valves at Big Rock Point Plant do not conform with the spring Gumher specified by Crosby specifications for the present set pressures tabulated above.
Spring No. 1673 which is installed in the Safety Valves is suitable for a set pressure of 1631 to 1804 psig.
3.3 The Consumers Power 3M,6 HC-75 Safety Valves, set at pressures from 1535 to 1588 psig should have Crosby Spring No. 1672 installed.
This spring is suit-able for set pressures ranging f rom 1501 to 1630 psig.
3.4 Dairyland Power 3M,6 HCU-65 Spec. Safety Relief Valves have Crosby Spring No.
1669 installed which is in agreement with Crosby specification. They are set at pressures 1390 and 1426 psig.
Crosby Spring No. 1669 is suitable for use at set pressures from 1341 to 1481 psig.
4.
Summary 4.1 This review showed that the control areas of the Crosby 3M 6 HCU-65 Spec.
2 and the 3M 6 HC-75 Safety Vaives are identical.
2 4.2 The valves performance is not affected by eaterial differences and when in-stalled for service at the sate operating and installation conditiens their performance will be similar.
4.3 Spring No. 1669 (set pressure range of 1341 to 1481 psig) is presently install-ed in the Dairyland Power 3M,6 HCU-65 Spec. Safety Relief Valves, Assembly No.
48697 Mod. 2.
This spring is proper for the set pressures per Crosby specifi-cation.
4.4 The Consumers Power 3M,6 HC-75 Safety Valves, Assembly Nunber 43864 have a spring installed that Is not in agreement with Crosby specification.
5.
Conclusion 5.1 Provided that Consumers Power 3M 6 HC-75 Safety Valves, Assembly No. 43864:
2 5.1.1 Have a spring installed that corresponds to Crosby Engineering Specification for specified set pressures.
5.1.2 The inlet and outlet installations (vessel anzzle and outlet piping) are identical to the Dairyland Power 3M 6 HCU-65 Safety Relief Valve 2
installation.
5.1.3 The Wyle Laboratory test siculated these conditions during tests.
5.2 Crosby could provide ring settings based on the testing of the Dairvland Power 3M,6 HCU-65 Spec. Assembly No. 48697 Mod 2, at Wyle Laboratories, that would give satisfactory valve performance.
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CROSBY V A LV E 8 GAGE COMPANY C FT O S B Y J
WRENTHAW, WASS T
Peport No. 3933
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Inlet Outlet Valve Flance Ratina, Flange Rating A
B Dairyland Power 3':36 HCU-65 1500 lb large groove 150 15 flat face 7-1/2 8-1/4 Consumers Power 3M 6 HC-75 2500 lb small tongue 300 lb raised face 8-1/2 8-7/8 2
FIGURE 1
o Report No. 3983 TABLE _1, Page 1 7
E N
Dairyland Power Consumers Power h
o' Assembly No. 48697 Mod. 2 Assembly No. 43864 3?f.j6 IICU-65 Spec. Safety Rellef Valve 3M,6 11C-7 5 Safet y Valve h
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Manufactured to Section VIII ManGractured to Section I Part Name Rules for Construction of Pressure Vessels Rulee for Construction of Power Bo!!crs u
Body 3" 1500 lb. Larne Groove Inlet Flange 3" 2500 lb. Sma ll Tonque Inlet Flange b
6" 150 lb.
F.F. Outlet Flange Connection Ser-6" 300 lb. Ra ised Face Out let Flange rations.
Material - Cast Carbon Steel ASTM A-216 h
ll Materla! - Chrome Molysteel ASTM A-217 GR WCB.
GR WC-6.
Inlet Center to Outlet Face 1/2 Inlet Center to Outlet Face 1/2 Outlet Center to Inlet Face 7/8 L
Outlet Center to Inlet Face 1/4 Top of Body to Nozzle Seat 3/4 n
Top of Body to Nozzle Seat 3/4 m
O Wozzle Ma terial 9-DL H.T.
Material - Same m
Manufactured to Same Dimensions and Toler-Manufactured to Same Dimensions and Tol-e ances as Assembly No. 43864 erances as Assembly No. 48697 Mod. 2 Wozzle Ring Material - 316 SST Material - Same zg <
Manufactured to Same Dimensions and Toler-Manufactured to Same Dimensions and Tol-
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ances as Assembly No. 43864 except this erances as Assembly No. 48697 Mod. 2 ex-m r-machined with Bellows Weld Prep.
cept this not machined with Bellows Weld z <
Prep.
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Bellows Ma terial - 316 L No Bellows in this design.
E Efi cct ive Area - 5. 68 sq. in.
installed IIeight - 5.081 r
k'ork ing St roke -.642 in Compression from
> o installed.
$m Bellows Adaptor Material - 316 L No Bellows Adaptor in this Design.
o 0.D. - 6.184/6.181 o
g Disc Insert
!!at erial -4 Pil AISI 651 Material - 19 4-DL y
Manufactured to same Dimensions and Toler-Manufactured to same Dimensions and Tol-p g
?
ances as Assembly No. 43864 erances as Assembly No. 48647 Mod. 2 N
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Report No. 3983 Page 8 e
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Table 1 (Continued) 3 O
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v Dairyland Power Consumers Power Assembly No. 48697 ffod. 2 Assembly No. 43864 3!1 6 IICU-65 Spec. Safety Relief Valve 3?!,6 11C-75 Safety Valve 7 Manuf actured t o section VIII flanhfactured to Section T i
Part Name Rules for Construction of Pressure Vessels Rules f or Const ruction of I'ower liollers Q
Cuide Material - Nicoloy Material - Same
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Control Dimensions Manufactured to same Control Dimensions Manufactured to same q
Ulmensions and Tolerances as Assembly No.
Dimensions and Tolerances as Assenbly No.
43864 made with slots to relieve pressure 48697 Mod. 2 made with Spindle Bearing.
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build-up.
Pressure build-up re]Ieved around bearing.
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Adjusting Ring Material - 316 SST Material - Same Manufactured to same Dimensions and Toler-Manufactured to same Dimensions and Tol-W 4
ances as Assembly No. 43864 erances as Assembly No. 48697 Mod. 2 s <>
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