ML19254D976

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Responds to IE Bulletin 79-15 W/Listing of Manufacturer, Model,Rated Capacity & Plant Application of 14 safety-related Deep Draft Pumps.Discusses Startup History, Type & Frequency of Testing & Maint of Pumps
ML19254D976
Person / Time
Site: Fort Saint Vrain 
Issue date: 09/14/1979
From: Justin Fuller
PUBLIC SERVICE CO. OF COLORADO
To: Seyfrit R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
P-79208, NUDOCS 7910300382
Download: ML19254D976 (16)
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Text

{{#Wiki_filter:. e T/c ~ '7?i@ public service company or odorado d September 14, 1979 Fort St. Vrain Unit No. 1 P-79208 Mr. Karl V. Seyfrit Nuclear Regulatory Coninission Region IV Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Docket No. 50-267

Subject:

NRC IE Bulletin No. 79-15 Dated July ll, 1979

Dear Mr. Seyfrit:

This letter is to inform you of the action taken in response to IE Bulletin No. 79-15 concerning deep draft pumps. A list containing the manufacturer, model number, rated capacity and plant application of the fourteen safety related deep draft pumps installed at Fort St. Vrain is included in Attachment A to this letter. Attachment B provides general pump dimensions in the form of vendor drawings. A dis-cussion of the startup history, type and frequency of testing and a descrip-tion of the routine maintenance history of all safety related deep draft pumps is contained in Attachment C. Eleven of the fourteen safety related deep draft pumps are in continuous operation and do not have startup histories. The start up histories for the remaining three pumps (P-4501, P-450lS and P-2105) are discussed in Attachment C. The operational problems and major repair efforts have been in the general category of wear. Pump components subject to wear include shafts, bowls, impellers, bushings, bearings, "0" rings and couplings. A major repair effort is defined as that work which requires pump or drive unit removal and/or disassembly due to pump performance characteristics which adversely affect pump performance. A detailed discussion of the major repair efforts on each pump is included in Attachment D. The longest period of pump operability between major repair efforts is also included in this attachme 1229 l!54 7 9103 00 3 ga

D ]D D TK ,2. j\\.I a o o Ju o Mr. Karl V. Seyfrit September 14, 1979 Page 2 Fort St. Vrain has not experienced the difficulties expressed in I&E Bulletin 79-15 as can be osserved in the attachmen:s to this letter. The deep draft pumps have operated properly and have experienced only expected wear. The part replacement frequency due to wear has been acceptable, i.e. long term cooling capability has not been abnormally affected by replacement of v:orn parts. I&E Bulletin 79-15 is considered closed by submittal of this letter. Very truly yours, .K. Fuller, Vice President Engineering and Planning JKF:eg Attachments j ' L,'lQ 7Cr esJ e

Fort St. Vrain Unit tio. 1 P-79204 ATTACHMENT A MANUFACTURER, MODEL NUMBER, CAPACITY AND PLANT APPLICATION OF DEEP DRAFT PUMPS 122'1 256

Attachment A EQUIPMENT MANUFACTURER MODEL CAPACITY PLANT APPLICATION NUMBER NUMBER P-2101 G0ULD PUMPS VIC-C.C.8JLO 340 GPM BEARING WATER PUMP 1A P-2101-S G0ULD PUMPS VIC-C.C.8JLO 340 GPM BEARING WATER PUMP 1B P-2102 GOULD PUMPS VIC-C.C.8JLO 340 GPM BEARING WATER PUMP IC P-2102-S GOULD PUMPS VIC-C.C.8JLO 340 GPM BEARING WATER PUMP 10 P-2105 G0ULD PUMPS VIC-4X9AHC 170 GPM BEARING WATER MAKE-UP PUMP P-2106 G0ULD PUMPS VIC-C.C.8JLO 340 GPM BEARING WATER PUMP 1E P-2107 G0ULD PUMPS VIC-C.C.LsLO 340 GPM BEARING WATER PUMP 1F P-4201 WORTHINGTON CORP. 20H-500-1 5250 GPM SERVICE WATER PUMP 1A P-4202 WORTHINGTON CORP. 20H-500-1 5250 GPM SERVICE WATER PUMP IB P-4202-S WORTHINGTON CORP. 20H-500-1 5250 GPM SERVICE WATER PUMP IC P-4501 WORTHINGTON CORP. 15M-185-3 1500 GPM FIRE WATER PUMP 1A P-4501-S WORTHINGTON CORP. 15M-185-3 1500 GPM EMERGENCY FIRE WATER PUMP IB (DIESEL DRIVEN) P-4118-A WORTHINGTON CORP. 20H-430-1 5340 GPM CIRCULATING' WATER MAKE-UP P-4118-B WORTHINGTON CORP. 20H-430-1 5340 GPM CIRCULATING WATER MAKE-UP 1229 257

Fort St. Vrain Unit No.1 P-79?04 ATTACHMENT B OVERALL DIMENSIONS OF DEEP DRAFT PUMPS 1229 258

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Fort St. Vrain Unit No. 1 P-79204 ATTACHI1ENT C A SUMIIARY OF STARTUP, TESTING AND ROUTINE MAINTENANCE HISTORY 1229 265 e e

Attachment C The safety-related deep draft pumps are started up and operated in a variety of modes. Eleven of the pumps are associated with systems that are continuously in operation, specifically the bearing water system, the service water system and the circulating water make-up system. The other three pumps are associated with intermittent applications. Four of the six bearing water pumps, P-2101/0lS/02/02S/06/07, are normally in operation at or near their rated flow of 340 gpm at all times. One, two or all three of the service water pumps, P-4201/02/025, may be in operation at any one time depending on plant cooling water requirements. The service water pumps normally each operate at or near their rated flow of 5,250 gpm. One circulating water make-up pump, P-4118A/B, is normally in operation at all times. The circulating water make-up pumps are normally throttled to maintain the required level in the cooling tower basin and therefore operate at a variety of flow rates below their full rated capacity, 5,340 gpm. The selection of which of these eleven pumps are in operation at any one time is a function of a wide variety of plant conditions. The firewater pumps, P-4501/0lS, and the bearing water make-up pump, P-2105, are operated on an intermittent basis. The normal function of the electric driven firewater pump, P-4501, is to maintain firewater tank level,-and. therefore its operation is sporadic. The diesel driven firewater pump, P-4501S, is started weekly to insure operability. When the backup bearing water system is out of service, the bearing water make-up pump, P-2105, is operated in a demand mode to supply make-up water to the bearing water system. There are a variety of instruments and alarms on each of these systems that monitor system and ouno performance and provide early indication of any pump problems. The number of pump startup cycles is not instrumented or monitored. Safety-related deep draft pumps are tested on a periodic basis using set test procedures. Tests performed include vibration checks, pump differential pressure measurements, visual checks of oil levels, proper greasing, water leaks, and packing condition. The bearing water pumps, P-2101/0lS/02/02S/06/07, and the bearing water make-up pump, P-2105, are tested annually. The service water pumps, P-4201/02/02S, are tested semi-annually. The firewater pumps, P-4501/0lS, are tested quarterly. The circulation water makep-up pumps, P-4118A/B, are the subject of a recently proposed fire protection technical specification which would require these pumps to be tested weekly. Pump.asting procedures and information is maintained by,the Maintenance Department. During operation, pumps are checked approximately every two hours by the operations staff. It is from these informal checks that most routine maintenance is initiated. Examples of routine maintenance are adding oil to maintain proper level, adjusting pa. kings, etc. This maintenance may or may not require the pump to be taken out of service. A detailed history of testing and routine maintenance is available at the plant site. 1229 266 e

Fort St. Vrain Unit Nc.1 P-79204 ATTACHMENT D OPERATIONAL PROBLEMS AND MAJOR REPAIR REPORTS 1229 267 P

Attachment D P-2101 o/28//b Cleaned driver motor windings. Longest period of operability: 5/75 to present, 51 months. P-210lS 1/14/74 Repaired shafts, new bearings installed Longest period of ouerability: 1/74 to present, 67 months. P-2102 6/22/77 New puup installed Longest period of operability: 6/77 to present, 26 months. P-2102S 2/18/74 Repaired shafts, new bushings and bearings. 9/17/76 Bowl asserably rebuilt. Longest period of operability: 9/76 to present, 35 nonths. P-2105 6/17/77 New pump installed 3/28/78 Bowl assembly rebuilt and tested. Longest period of operability: 3/78 to present,17 months. P-2106 12/11/74 Replace shaft, bowl bearings installed and bowls repaired 7/1/76 Repaired shaft, bowl asserably rebuilt. Longest period of operability: 7/76 to present, 37 months. P-2107 3/2/77 Pump rebuilt, new seal installed. 4/7/78 Repaired shaft, bowl assembly rebuilt and factory tested. Longest period of operability: 4/75 to 3/77, 23 months. P-4201/02/0%S 12/8/77 Pump rebuilt and factory tested. Longest period of operability: P-4201: 6/75 to 12/77, 30 nonths P-4202: 11/75 to 12/77, 25 months P-4202S: 12/75 to 12/77, 24 months P-4501 Longest period of operability: 3/74 to present, 65 months P-450lS 9/76 Gasoline engine replaced with diesel engine. Longest period of cperability: 9/76 to present, 35 nonths. 1227 268

Attachment D P-4118-A/P-4118-B : Longest period of operability: 6/75 to present. 1229 269 1}}

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