ML20149J492
| ML20149J492 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/05/1988 |
| From: | Kulchak R MORRISON-KNUDSEN CO., INC. |
| To: | Taylor J NRC |
| References | |
| REF-PT21-88, REF-PT21-88-009-000 PT21-88-009-000, PT21-88-9, NUDOCS 8802230083 | |
| Download: ML20149J492 (7) | |
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. CONTRACTORS ,
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, PHCe4 (?c86 386 K00.fELEX. M403 ,/ i ! i l a . February 5, 1988 Serial #10CFR21-88-1 ; TO-3Ii
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i l 1 Mr. Janes Taylor ; US?iC l i 1717 H Street ! Washington, D.C. 20555 !
Subject:
Potential 10CFR21 Finding - Testing of EAD20-635E4 < j Type 999 Uil t Gncrgency Power Cenerator , i
Dear Sir:
j i We have been advised by our Pawr Systans Divisico in Rocky Mouit', North [ 1 Carolina of a potential probim) with the above subject Type 999 Unit vdilch ; 3 is in nuclear service (correspondence attached). J j Please accept ny apologies for the delay in tranm11tting this potential l finding. We will fonwrd additional infonmtion as it becmes available, f 1 Very truly yours, ! AAO4A.- ; j R. D. Kulchak l Director Quality Assurance l { l F0K/gs ! l Attach. i H. Falter cc: ! ! V. Mitchell l Flie l ! f[Ai I # l l 8802230003 990205 , gon Aoock0 9 M9 i ! M l i f
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. serial no. -o-o045 i MORRISON-KNUDSEN COMPANY, INC. gECE/ yED INTER. OFFICE CORRESPONDENCE k j oats- January 26, 988 NCE yo. Pcn Kulchak (Quality-Boise) nou IIarry W. Falter Vann Mitchell, Ken Irwis and
- tocatiow Ibn Galeazzi (Ibcky Mount) ' oc ' 7 ' o N Rocky Mount,?C i
susa c7 Bruwns Ferry - Possible 10CFR21 ! Call 1/25/88 - Mr. Ed Freman - 205-729-3363 , j l I ! j 1. Browns Ferry were conducting a test on the DD20-645E4 - !
! Type 999 unit. They were carrying a 2950 KW @ 80 PF khen the :
! field breaker tripped. l )
- 2. Freman reported that they had m2asured 96 tcp at the circuit :
breaker and 112 Anp in the field. l I 3. Attached is a copy of the schantic which shows a 100A ! j circuit breaker. Freman identified the circuit breaker as ! j a G.E. Type TED136100. The schmutic is frcm an DD drawing i a and the 100A is DD's notation, j
- 4. The DD Characteristic Curves show that the generator field .
requires 100 Anps at 2600 KW and 80% PF. . 5. It would appear that 100 Anp is too low a rating and should j i be 125 Amp, but this wcr. tid require a larger frame size ! circuit brerAer for wc.*ch there would not be enough recm in
- the cabinet, j
$ 6. I have asked DD to check into this matter. I do not know ] why the Amps at the breaker should be less than the tcps at ; e the field. As I see it, all the field Aq:s can frcm the : ) EPr and PCr transforners. ! 1 ! ! 3 ! I
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i Electro-Motivt Cencrator tiodel A20 A20 A20 6 A20 6 l ( Cenerator Frequency . Hz (cycles per second) 60 50 60 60 ) l ' j Speed . rpm 900 750 900 900 ; Rating KW 2600 2200 1609 *100 ; I KVA 3250 2750 2000 2625 ! l _ rower Factor. __ 0.y 0.8 0.f 0.8 j Termi 1 Voltage . 3. phase : l
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Delta 2400 2400 480 600 j ] 96.2 96.4 Efficiency . Rate' KVA and Power factor 97.2 96.5 Armature Current . Amperes ; } j Wye 451 382 .... .... j Delta 782 662 2400 252) , t'ominal Stator Tetaperature Rise . OC
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" [ Reactances Per unit Direct Axis Synchronous, xd 1.66 1.21 1.25 1.04 l Quadrature Axis Synchrenous, xq 1.00 0.73 0.75 0.63 l
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J Direct Axis Transient, xd' O.44 0.27 0.316 0.266 ! Direct Axis Subtransient, xd" 0.28 d.17 0.217 0.182 7 Negative Sequence, x2 0.22 0.22 0.180 0.148 ; i Zero Sequence, x, 0.11 0.10 .... .... l l Time Constants Seconds 0 75 C (193' F) j Direct Axis Tranalent Open Circuit. Tdo' 4 34 4 34 4*li 4*34 i 4 Direct Axis Subtansient Short Circuit, Id " 0.017 0.01E 0.023 0.023 j l Direct Axis Transient Short Circott, T d' O.654 0.620 * '12 1.02 i i Armature Time Constant T,3 0.09 0.09 0. o 4 '+ 0.044 l l Short Circuit Ratio 0. 6'4
- 1. ! ! 0.83 1.12 l T. I . T. Falanced 14 14 30 30 !
Fesidual .... .... 29 29 [ } Regulation at Rated Load . Per Cent 42.8 23.3 43.8 20 , l Synchrontaing Coefficient . KW/Raditn 1 Full Load 5770 5910 4 2 '+0 6213 l Na Losa 32w 37R9 2670 4180 f Field Data 0 F.esistance at 75 C (193 F) 1.258 1. 258 1.258 1.258 Excitation at No Loao Rate d Volt s 39.2 55.0 34.0 H.0 l' Excitation at Full Load Rated V 100 121.5 e 9. 0 7 '. 0 1 Nominal Field Temperature Ris< , OC 65 H5 60.0 90 ; 4 0F 149 185 1 *+0 1. 9 % < < i Tetal W ight . Pounds 18,100 18,109 18,100 18,100 , a Stator 9,000 9,000 4,000 9,000 j j 70ter R 100 8,109 8,100 5,100 - 1 End it ustrg 4. Bearing 1,090 1,000 1,600 1,000 1 l
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