ML19225A263
| ML19225A263 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 07/11/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Johari Moore SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 7907180706 | |
| Download: ML19225A263 (1) | |
Text
{{#Wiki_filter:,.@'No u w, q}3 UrJI TED STATES -77 3 'N NUCLEAR REGULATORY COMT11SSION e _ [,[g'Q@g; ;j [cf l REGIOrJ V c;, No b, j f 1910 r! CAllf 0HNI A I1OULEVAHD 'c
- '8 f SUl rE 207, WA LNUT Cf1E E K PL AZA WALN'JT CHF E K, CAL IF OI NI A 9439G eftL July 11, 1979 Cocket flo. 50-205 Southern Califor.'ia Edison Company P. O. Box 800 2244 Walnut Grove Avenue Rosomead, California 91770 At ter.ti on:
Mr. J. B. Moore Vice President Gentlemen: Tha enclosed IE Bulletin :;o. 79-15 is forwarded to you for action. A written response is required. If you desire additional inforr,1ation regarding this matter, please contact this office. Sincerely, ll (... eL. y R. H Engelken Director
Enclosures:
1. IE Bulletin Ib. 79-15 2. List of IE Bulletins Issued in Last 12 Months cc w/ enclosures: J.11. Curran, SCE J. T. Head, SCE \\ / D0718 0 7ag 347 202
UillTED STATES I'UCLEAR REGULATORY COMMISSION OFFICE OF IT;SPECTION AfiD EilFORCEMEllT WASHI!iGTON, D.C. 20555 July 11,1979 IE Bulletin fio. 79-15 DEEP DRAFT PUMP DEFICIEiiCIE.S Description of Circumstances: On October 20, 1978, Comonwealth Edison Company reported that manufacturing deficiencies had been identified in new high pre % ure core spray, low pressure core spray, and residual heat removal pumps manufactured by Ingersoll-Rand (I-R) Company, Cameron Pump Division. Each of these pum:s is a vertical turbine pump with impellers located in bowls in a sump or a self ccr.tained barrel. The motor (prime cover) is located at the highest pump election to take into account maximum flooding at the site or space considerations. The suction is at the lower end of the pump while the discharge head is just below the driver. Bearings supporting the vertical shaf t segments (unally 5 to 10 segnents) are either self lubricated, force fed (lubricated by fluid being pu. ped), or oil lubricated and maintained within their ewn isol ned systen. These purps are designated as " Deep Draf t" Figures 1&2 show typical cutlines of such pumps. The i,1ternal deficiencies, identified through dimensional and visual inspections were as follows: Low Pressure Core Spray Pumps (I-R Model flo. 29APKD-5) (Date of Manufacture - Feburary 1973) Loose impeller bolts and bolts improperly staked Loose key - key,iay fit Excessive runout on pump shaft Bearing showed wear Bearing clearance exceeded recommended tolerance Coupling thread galled Wear ring clearance out-of-specification Impeller-to-shaf t clearance out of specification Cracks found in second-and-third-stage impellers Stuffing box bushings were severely galled F, ige Pressure Core Spray Pumps (I-R Model No.12X20KD) (Date of Manufacture - Sep' ember 1972) t 3 Bearing clearance exceeded recog g Ucar ring clearance out-of-specl a DUPLICATE DOCUMENT i Bearings showed wear Entire document previously entered into system under: ANO j -3 No. of pages: w' 'dJ v, L_ _ __ _a. _ _.. . _. ~. =:}}