ML20039E757
| ML20039E757 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/04/1982 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Eisehut D, Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| REF-GTECI-A-36, REF-GTECI-SF, RTR-NUREG-0612, RTR-NUREG-612, TASK-A-36, TASK-OR NUDOCS 8201110342 | |
| Download: ML20039E757 (44) | |
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4 BALTIMORE GAS AND ELECTRIC CHARLES CENTER P.O. BOX 1475 BALTIMORE, MARYLAND 21203 ARTHun E. LUNDVALL, Jm.
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Mr. Darrell G. Eisenhut, Director
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Washington, D.C. 20555 4
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Subject:
Calvert Cliffs Nuclear Power Plant O:
s Units Nos.1 & 2; Dockets Nos. 50-317 & 50-318 '" 77 j Control of Heavy Loads
Dear Mr. Eisenhut:
Enclosed are forty copies of our phase one report providing you with the information requested in paragraph 2.1 of your December 22, 1980 letter except as specifically modified in the report. Please note that Exhibit C is missing electrical drawing SK-ME-103. Copies will be forwarded as soon as completed.
We are taking the necessary steps to complete the phase two segment of the study prior to our Spring outage.
Very trul rs,
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Summary This report constitutes our initial response to your letter of December 22, 1980 on NUREG-0612.
The following is a summary of our results to date.
We have provided the information requested in a question / response format in Section III of this document.
All information required to meet the intent of NUREG-0612 for the spring outage will be completed prior to that time.
We have reviewed areas in the vicinity of plant overhead handling
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systems with respect to identifying possible load drops on safe shutdown / decay heat removal systems. Where this possibility exists we are reviewing the associated handling systems to referenced and other codes and standards stated herein. The aspects of major plant cranes reviewed to date have identified only minor differences with those standards. We feel at this time that these deviations can be accepted as is.
Procedures for specific heavy load lifts and crane operation, testing, and maintenance have been reviewed where handling systems operate above irradiated fuel and safe shutdown / decay heat removal systems.
These procedures have been evaluated against the referenced ANS1 standards and the requirements of NUREG-0612 and, as a result, some minor modifications to documents will be made.
Non-special lif ting devices (e.g., slings) are being maintained and inspected in compliance with the ANSI standard however verification of initial design is not possible in most cases.
New procedural requirements will correct this as inventory is replaced.
Special lifting devices were not designed in accordance with ANSI N14.6.
We conclude from our evaluation to date that continued use of the special lifting devices meets the intent of the guidance in NUREG-0612.
Structural and electrical designs of major plant cranes have been completed and are in general compliance with referenced standards stated herein.
Mechanical aspects reviewed to date are also in compliance.
No exceptions to ANSI standards for operator training have been identified. Procedures verifying training program requirements are in effect.
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Trek 05094 - H zvy Loada II.
Definitions 1.0 Safe Shutdown / Decay Heat Removal Systems:
Safe Shutdown / Decay Heat Removal Systems are identified in Regulatory Guide 1.29, Position C.1 as modified by Section 1.3 of the December 22, 1980 NRC letter.
BG&E has identified these systems in the Alternate Safe Shutdown Analysis and Interactive Cable Analysis sent to the NRC on September 30, 1981, as well as in the FSAR Section 10 Appe idix 10.A.
Systems or components identified as being part of the alternate safe shut down path were not included in this review.
2.0 Heavy Load A heavy load is any load which is approximately equal to or t
greater than the weight of on fuel assembly and its associated lifting device. For Calvert Cliffs this weight is 1600 pounds.
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Tc k 05094 - He".vy Lords
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III. Responses to December 22, 1980 Letter A.
Phase I 1.
Report the results of your review of plant arrangements to identify all overhead handling systems from which a load drop may result in damage to any system required for plant shutdown or decay heat removal (taking no credit for any interlocks, technical specifications, operating procedures, or detailed structural analysis).
Response
The cranes, hoists, and monorails listed as part of Exhibit A are capable of handling heavy loads which, if dropped, may result in damage to safe shutdown or decay heat removal systems regardless of interlocks, technical specifications, operating procedures, or detailed structural analysis.
The handling systems listed and considered in this evaluation are permanently installed plant equipment.
Determination of Safe Shutdown / Decay Heat Removal systems used in this review was performed using the Alternate Safe Shutdown analysis generated and submitted to meet Appendix R requirements (S.E.R.
Item 3.2.1).
Only the normal shutdown systems were identified and are reflected in the drawings attached for our response to item 3.a.
Where preliminary structural review for an area indicates that floor penetration of a dropped load may occur or analysis is not complete and safe shutdown items are in the area below, the handling system is included in Exhibit A.
Should a more detailed analysis later conclude that both penetration and spalling that could cause damage are not possible, that system will be considered to be excluded from this section (assuming no other hazard exists).
Page 3
Ta k 05094 - Rr_vy Loada 2.
Justify the exclusion of any overhead handling system from the above category by verifying that there is sufficient physical separation from any load-imp.tet point and any safety-related component to permit a determination by inspection that no heavy load drop can result in damage to i
any system or component required for plant shutdown or decay heat removal.
Response
The lifting devices excluded from analysis under this review are listed in Exhibit B.
Our inspection has indicated that either sufficient separation exists between the lift point and any safe shutdown / decay heat removal equipment; and/or the overhead handling system capacity is less than that of a heavy load.
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Tcck 05094 - H cvy Loads i
3.
With respect to the design and operation of heavy-loads-handling systems in the containment and the spent fuel pool area and those load-handling systems identified in 2.1-1,
- above, provide your evaluation concerning compliance with the guidelines of NUREG 0612, Section 5.1.1.
The following specific information should be included in your reply:
3.a.
Drawings or sketches sufficient to clearly identify the location of safe load paths, spent fuel, and safety-related equipinent.
3.b.
A discussion of measures taken to ensure that load handling operations remain within safe load paths, including procedures, if any, for deviation from theses paths.
Response
Exhibit C represents load paths for heavy load movements regularly performed at Calvert Cliffs Units 1 and 2 as referenced in BG&E's interim response dated June 25, 1981.
During the course of Phase II, these load paths will be re-reviewed and the results of our analyses will be used to modify those paths in order to minimize the potential for damage from an accidental load drop while maintaining flexibility for load movements.
Exhibit C also includes drawings indicating the locations of spent fuel and safe shutdown piping, instrumentation and cable in areas beneath load handling systems.
The implementation methods necessary for enforcement of a particular load path will also be determined during completion of Phase II as the configuration and extent of allowable load paths are finalized.
We intend to review (as part of Phase II) the entire area in the path of a handling system in order to maximize the acceptable movement area under that system.
(The existence of complete exclusion areas is also articipated).
These paths would be simplified to the maximum extent possible in order to facilitate load handling path decisions in the event that the normal path is not available. Those load paths would be attached to applicable load movement procedures.
If a deviation from thc defined load path is necessary, our current procedure is to have an engineering review.
The results of this engineering evaluation are then forwarded to our Plant Operations and Safety Review Committee for review before allowing the deviation.
We feel that the use of equipment landmarks as indicated on load path drawings would be preferable to load paths marked on floors Page 5
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Tx k 05094 - H zvy Loada 4
as referenced in the NUREG.
Training of handling system operators will also be an important factor in assuring adherance to safe load paths.
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T= k 05094 - H3cvy Load 3 3.c.
A tabulation of heavy loads to be handled by each crane which includes the load identification, load
- weight, its designated lifting
- device, and verification that the handling of such load is goverr.ed by a written procedure containing, as a minimum, the information identified in NUREG 0612, Section 5.1.1 (2).
Response
Exhibit A lists by load handling system, the heavy loads, and their associated weights, lift devices and an indication of whether or not the load movement is presently governed by procedure (s).
Calvert Cliffs Instruction (CCI) 201A provides guidelines for crane operations and inspection reports.
Review of our current procedures identified several minor deviations from the referenced standard and the guidance of NUREG-0612.
These procedures are being revised and scheduled to be completed prior to our next scheduled outage next April.
Where loads have no procedure governing their movement, lift procedures will be established in accordance with our interim response, Measure 2.
No procedures will be written for load handling systems eliminated from Phase 1 consideration.
Page 7 l
Tcck 05094 - Hac.vy Load 3 3.d.
Verification that lifting devices identified in 2.1.3-c, above, comply with the requirements of ANSI N14.6-1978 or ANSI B30.9-1971 as appropriate.
For lifting devices where these standards, as supplemented by NUREG 0612. Section 5.1.1 (4) or 5.1.1 (5), are not met, describe any proposed alternatives and demonstrate their equivalency in terms of load handling reliability.
Response
Lifting devices were not designated in accordance with either ANSI N14.6 or ANSI B30.9.
Special lifting devices were designed using accepted engineering practices.
Evaluation of the design of special devices reviewed to date indicates that in some cases the ANSI stress design factor for structural items is not satisfied. However, these items are considered satisfactory for continued use.
A program for material handling equipment maintenance, inspection, and testing (CCI-219A) was instituted in early 1980 for Calvert Cliffs Units 1 and 2.
Under this new program, we are in compliance with the ANSI B30.9 standard.
Verification of factors of safety of non-special slings currently in inventory is not possible, although we feel that based on our inspection program and training of riggers, continued use of these devices is justified.
As inventory is
- replaced, manufacturer certified factors of safety will be obtained as a matter of policy and in accordance with the plant procedures.
At present, newly purchased non-special lifting devices are required by procedure to be complete with a certificate of compliance of design load to the specified requirements.
l Page 8 i
Tcck 05094 - H =vy Licd3 3.e.
Verification that ANSI B30.2-1976 Chapter 2-2, has been invoked with respect to crane inspection, testing, and maintenance.
Where any exception is taken to this standard, sufficient information should be provided to demonstrate the equivalency of proposed alternatives.
Response
As indicated in our Interim Measure 4 Status statement, we are committed to implementing ANSI B30.2 and a review of existing overhead handling system inspection, testing, and maintenance procedures to the standard has been performed.
As previously discussed, our procedure CCI-219A has been established (superceding our previously existing program) which outlines inspection, testing and maintenance requirements intervals for all har.dling systems.
This procedure is being revised to more closely reflect the requirements of the ANSI standards.
Our review of existing procedures to both ANSI B30.2 and ANSI B30.16 has identified some minor deviations and revisions to our procedures will be incorporated to meet the appropriate code.
In addition, some overhead handling systems have been identified, as a result of review to NUREG-0612, which will require specific inspection, testing and/or maintenance procedures to be developed.
However, these devices are now included in the scope i
rif CCI-219A which requires such procedures.
Page 9
Tx k 05094 - He:vy Load 3 1
3.f.
Verification that crane design complies with the guidelines of CMAA Specification 70 and Chapter 2-1 of ANSI B30.2-1076 including the demonstration of equivalency of actual design requirements for instances where specific compliance with these standards not provided.
Response
The overhead cranes (polar crane, spent fuel cask crane, intake structure crane, turbine building main, and auxiliary cranes) were purchased using the Electric Overhead Crane Institute's Specification Number 61 (EOCI-61), American Institute of Steel Construction (AISC), American Welding Society's (AWS) design codes, and American Society for Testing and Materials (ASTM) specifications. As minimum requirement structural design was in accordance with E0CI-61 except where more strict requirements gove rned.
All structural members not covered by EOCI-61 were designed and fabricated with standard specifications and codes of the American Institute of Steel Construction except that the unit stresses shall not exceed ninety percent of the values stated in the code.
Please note that CMAA-70 is a revision of E0CI-61.
The most significant difference between E0CI and CMAA-70 relates to an increase in impact factor.
We have completed structural and electrical analysis and partial-ly completed the mechanical analysis of the above cranes.
No significant deviations were revealed by this review and evalu,ation that would necessitate further action to ensure adherance to the NUREG guidance.
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Tc;k 05094 - He vy Lo;d3 g.
Exceptions, if any, taken to ANSI B30.2-1976 with respect to operator training, qualification, and conduct.
Response
Calvert Cliffs has instituted procedure CCI-210A to set guidelines for crane operator training prior to the issuance of NUREG-0612.
This procedure assures all crane operators will be trained in accordance with ANSI B30.2-1976 Section 2.3.1.
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No exceptions to that standard have been identified.
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T= k 05094 - H zvy LoadJ 1
Exhibits 1
Exhibit A -
NUREG-0612 Overhead Handling Systems Exhibit B -
NUREG-0612 Excluded Overhead Handling Systems i
Exhibit C --
Requested Drawings SK-ME-101 Load Paths (5 Sheets) i SK-ME-102 Safe Shutdown Piping (3 Sheets)
SK-ME-103 Safe Shutdown Instrumentation and Cable Exhibit D -
Safe Shutdown Equipment Basis from Alternate Safe Shutdown Analysis (10 Sheets) m i
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Tzak 05094 - H2cvy Lords Exhibit A Overhead Handling Systems Crane Load Weight **(Ib.)
Lift Device Procedure Polar Neutron Shield Framework 10,000 total Sling Assembly RV-54 180 T/25 T 4 pieces par Device for RV Head, Hoist only 2,000 Polar Crane None - Use is Indicated in RV-7 and RV-8 par Device 4,000 par Hoist Device None - Use is Indicated in RV-7 and RV-8 Polar Crane Main Hoist Load Block 9,000 Polar Crane None Reactor Cavity Seal Ring 12,000 Reactor Cavity Seal RV-9 Ring Lift Rig RV-10 Reactor Coolant Pump Motor 90,400 R.C. Pump Motor RCS-1 Sling Assembly RCS-2 Reactor Vessel Head / Shroud 150,000 R.V. Head Lift Rig RV-7 RV-8 Reactor Vessel Head Lift Rig 18,220 Polar Crane HE-3 HE-16 Reactor Vessel Stud Tensioners 2,250 Hoists on Reactor None Head Lift Rig Support Frame ICI Removal Tool 7,500 Polar Crane None - Use is Indicated in RV-17 RV-18 Where no designated device is indicated lift is accomplished with slings identified as necessary and proper by a qualified rigger.
- Weights are approximate and except where indicated do not include lif t device or load 'slock.
Page 1 of 4
Ts k 05094 - Hrvy Lorda Exhibit A Overhead Handling Systems Crane Load Weight **(1b.)
Lift Device Procedure Polar Refueling Pool Stairs 8,000 No Designated Service ** None 180 T/ 25 T Upper Cuide Structure Lift Rig i 14,000 Polar Crane RV-17 Assembly Incl. Tripod Load Cell RV-18 Upper Guide Structure 96,000 UGS Lift Rig RV-17 RV-18 Tripod Assembly 2,000 Polar Crane HE-1 Load Cell HE-2/0 Combined UGS/ICI Assembly 116,500 Polar Crane RV-17 RV-18 Core Support Barrel Lift Rig 14,000 Polar Crane None Core Support Barrel 250,000 CSB Lift Rig None Spent Fuel Load Block 8,250 Cask Crane None Cssk Crane 150 T/15 T Irradiated Specimen Cask 10,000 max.
Cask Yoke None Spent Fuel Shipping Cask 10,000 max.
SF Cask Yoke FH-33 Spent Fuel Cask Yoke 2,000 Cask Crane FH-33 New fuel Shipping Container 25,000 No Designated Device **
FH-1 Spent Fuel Divider Cate 3,300 No Designated Device **
HE-27 HE-28 CE Superstand (Upper) 8,000 Lift Bar w/ Slings FH-9 CE Superstand (Lower) 13,000 Lift Bar w/ Slings FH-9 Page 2 of 4
Tcck 05094 - Hesvy Lords
, Exhibit A Overhead Handling System Crane Load Weight **(1b.)
Lift Device Procedure Turbine Bldg.
Generator Rotor 351,300 No Designated Device **
None M in Crane
'200/25 T HP Turbine Rotor 113,200 No Designated Device **
None LP Turbine Rotor 260,000 No Designated Device **
None Turbine Bldg.
Miscellaneous 80,000 No Designated Device **
None (Max.)
Aux. Crane 40 T/10 T Intake Structure Load Block 1,800 Crane None Semi-Gantry Crane 35 T/10 T Roof Hatch Covers 9,000 max.
No Designated Device HE-32 Circulating Water Pump:
Motor 46,660 No Designated Device **
HE-32 Filler Piece Assembly 14,175 No Designated Device **
HE-32 Shaft / Impeller Assembly 10,195 No Designated Device **
HE-32 Salt Water Pump 8,000 No Designated Device **
HE-32 Transfer Machine Spent Fuel Transfer Carriage 12,000 Lifting Beam / Slings FHE-1 FHE-2 Jib Crane 6T Filter Cask Filter Cask 10,000 Cask Lift Rig RCP 3-512 Monorail (s) 7.5 T Resin Cask 40,000 Cask Lift Rig RCP 3-512 Filter Hatch Floor Plugs 12,000 max.
No Designated Device None i
i Solid Waste Filter Cask 10,000 Cask Lift Rig RCP 3-512 l
Disposal Trolley Hoist 40T Resin Cask 40,000 Cask Lift Rig RCP 3-512 Page 3 of 4
Tcck 05094 - Hasvy Lords Exhibit A Overhaad H:ndling Systca3 Crane Load Weight **(1b.)
Lift Device Procedure l
l Diesel Generator Engine Head 10,000 No Desigt.sted Device None Room Monorail 5 T (Max.)
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(1 per D.C. Room)
Upper Crankshaft No_ Designated Device None Main Steam MSIV Cylinder Module 14,000 No Designated Device None Room Monorails (4-3 T)(2-1 T)
MSIV Yoke 2,500 No Designated Device None j
Salt Water Pump Motor 8,400 No Designated Device HE-32 M2 chine Shopf 10,000 Manorail 5 T Miscellaneous (Max.)
No Designated Device None Ctet. Equip.
Equipment Hatch 30,000 No Designated Device HE-13 HE-15 Hstch Hoist 15 T Ctst. Equip.
Miscellaneous 10,000 No Designated Device None Bsy Jib Crane (Max.)
(Not Yet Installed)
Cttt. Equip.
Miscellaneous 6,000 No Designated Device None Bzy Beam Crane (Max.)
(Not Yet Installed)
Component Cooling Component Cooling Piping 2,000 No Designated Device None Room Hoist Switchgear Roomf Miscellaneous 20,000 max.
No Designated Device None M:norail Hoist (10T)(1 per unit)
- May be excluded based on drop analysis of floor - no SSD/DHR in room.
Page 4 of 4
Tc k 05094 - He vy Loada Exhibit B Overhead Handling Systems Excluded From Review Chlorine House Monorails Sufficient Separation Condensate Demineralizer Area Monorail Sufficient Separation Condenser Water Box Removal Monorail Sufficient Separation Reactor Head Stud Handling Jib Crane (not yet installed)
Capacity Less Than Heavy Load (in Ctat.)
Spent Fuel Pool Jib Crane Capacity Less Than Heavy Load (Over S.F.P.)
Vertical Lifting Rail Sufficient Separation Hot Machine Shop Crane Sufficient Separation Decontamination koom Hoist Sufficient Separation 1
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