ML20234B505
| ML20234B505 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 11/30/1987 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20234B492 | List: |
| References | |
| NUDOCS 8801050584 | |
| Download: ML20234B505 (321) | |
Text
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ENCLOSURE PLANT HATCH - UNITS 1, 2 NRC 00CKETS 50-321, 50-366 OPERATING LICENSES DPR-57, NPF-5 DETAILED CONTROL ROOM DESIGN REVIEN FINAL REPORT l
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c 1 8801050584 871230 gDR ADOCK0500g,1 1
4 CONTENTS O SUBJECT PAGE Summary ii Section 1 - Panel Analysis H11-P600 1 H11-P601 6 H11-P602 27 H11-P603 43 i H11-P609 55 H11-P611 59 H11-P614 63 H11-P645 67 H11-P650 71 H11-P651 87 H11-F652 95 H11-P653 103 H11-P654 105 H11-P655 115 H11-P656 120 H11-P657 124 H11-P700 138 H11-P702 149 O N62-P600 Generic 154 165 Remote Shutdown 174 Section 2 - Control Room Environment HVAC 175 Illumination 183 Audible 218 Section 3 - RHR/RHRSW MPL Designation 230 i !
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SUMMARY
Two control room surveys have been performed at Plant Hatch resulting in 760 human factor discrepancies. These 760 problems cover all aspects of the control room f rom improper labels to poor lighting. The DCRDR team categorized each of these HED's in 1986 and provided recommendations for the December,1986 summary report. Many of the HED's had already been corrected, were insignificant, or would be corrected with the surface enhancement program. However,116 HED's represent significant cost for I
correction. These HED's required an engineering review before a resolution l could be determined. Most of these problems concern panel layout, annunciator deficiencies, and the control room environment. Each of the 116 HED's is analyzed in this report with recommendations provided. Table 1 presents a list of the total 760 HE)'s by major group.
NUREG-0700, Guidelines for Control Room Desian Reviews. is utilized as the design criteria for this study. This document not only defines the method for establishing a control room review program, but also includes control room human engir;eering guidelines. Two important points should be noted.
First, this study only analyzes the 116 HED's requested. The remaining elements in the control room have not been reviewed for compatibility with NUREG-0700. Secondly, NUREG-0700 is a document of guidelines and not mandatory requirements. This study attempts to recommend modifications {
resulting in conformance to the criteria as closely as possible. However, '
the practicality of retrofitting an existing control room has not been overlooked.
(' This report is presented in three sections. These sections include Panel Analyses, Control Room Environment, and RHR/RHRSW MPL Discrepancy. The !
panel analyses are based on the HED's written against the particular panel.
These HED's can basically be classified as affecting instrumentation or annunciators. Each panel is listed (Units 1 and 2 combined) with the HED's analyzed. Therefore, one specific HED may be analyzed for multiple panels with the resolution panel dependent.
Section 2 of this report concerns the control room environment. Included in this section are evaluations of the control room HVAC system, illumination levels, and audible levels. Data was collected in all three of these categories to determine actual control room conditions during normal ,
operation. Section 3 deals with the problems resulting from the RHR and )
RHRSW systems having the same MPL designation. Several HED's are listed as i i " generic" and affect all panels in the control room. Analyses for these .
HED's are included with the panel analyses. I Conforming to the guidelines for panel layout and annunciator grouping is a relatively difficult task. The approach used in this study is to group components by all of the following: system, functional layout, division, and Unit 1 panel to Unit 2 panel similarity. Several problems immediately arise with this task. The two units were constructed at different times. ,
Therefore, systems are different, components are not alike, and panel layouts are not always identical.
Space limitation is one of the major problems f or panel regrouping.
However, panels with discrepancies have Thebeen evaluated annunciator and changes groupings have been e
recommended to enhance panel layout. The
.Y extensively reorganized to conform to the previously noted criteria.
implementation dates indicated for the modifications assume In particular, the a minimum numb annunciator of separate Design Change Requests (DCR's). l regrouping should be performed on all panels in one outage.
More ]
This study has been prepared using the latest information available.
detailed investigation would be required during the design phase to ensure the recommended changes not only conform to human engineering criteria, but l also divisional separation, seismic criteria, and safety concern in improved safety.
Once the control room is repaired to the desired level, ongoing reviews will be required to maintain the man-machine interface at acceptable quality standards.
The recommendations proposed in this study are consideredHowever, to it isbe the most ideal solutions to both specific and generic HED's.
important that the implementation phase of this program have flexibilMd 50 adjustments can be made as the industry and the program evolve, and we can benefit from " lessons learned".
Therefore, the recommended solutions contained in this study are subject to change or modifications as appropriate.
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I TABLE 1 O
A. HED's CORRECTED SINCE 1981 SURVEY 43, 52, 53, 55, 56, 61, 88, 97, 101, 112, 127, 131, 132, 141, 142, 144, 145, 147, 148, 149, 151, 153, 155, 156, 157, 158, 159, 161, 164, 178, 181, 199, 200, 209, 210, 212, 213, 214, 223, 230, 232, 237, 242, 246, 248, 250, 264, 265, 267, 268, 269, 270, 290, 291, 292, 294, 312,-342, 351, 352, 353, 357, 358, 359, 360, 361, 362, 364, 365, 368, 375, 376, 379, 380, 381, 382, 384, 385, 386, 393, 397, 398, 399, 402, 403, 413, 425, 453, 454, 462, 463, 464, 465, 502, 514, 532, 541, 568, 569, 571, 578, 616, 657, 686, 753, 757 TOTAL 106 B. HED's- NO ACTION REQUIRED 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 14, 16, 17, 18, 19, 20, 21, 22, 23, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 60, 70, 74, 75, 77, 87, 95, 1 102, 154, 160, 166, 170, 171, 172, 174, 176, 185, 188, 189, 190, 191, 201, 202, 203, 205, 211, 215, 216, 219, 220, 224, 227, 229, 236, 239, 241, 247, 249, 253, 256, 257, 281, 287, 288, 289, 293, 314, 315, 323, 324, 326, 327, 320, 329, 332, 334, 335, 336, 337, 338, 339, 340, 341, 343, 344, 345, 346, 347, 348, 349, 350, 354, 355, 356, 363, 366, 367, 369, 370, 371, 373, 374, -
77, 378, 383, 387, 388, 389, 394, 400, 401, 404, 405, 412, 415, 416, 417, 0419, 420, 422, 423, 424, 426, 428, 448, 449, 452, 455, 457, 458, 459, 460, 461, 466, 467, 473, 474, 478, 485, 491, 493, 494, 495, 496, 497, 504, 506, 510, 515, 520, 521, 522, 523, 524, 530, 538, 539, 544, 554, 560, 579,-584, 587, 588, 590, 591, 592, 593, 597, 598, 599, 603, 607, 610, 621, 624, 625, 626, 630, 631, 633, 634, 640, 641, 642, 648, 658, 661, 664,-677, 684, 685, 687, 688, 689, 690, 694, 695, 697, 700, 701, 702, 711, 712, 713, 716, 718, 723, 724, 725, 731, 735, 736, 743, 744, 747, 748, 751 TOTAL 230 O iv l
nC HED's- CORRECTED BY SURFACE ENHANCEMENTS U 10, . 13, 24, 26, 44, 45, 46, 47, 48, 49, 50, 51, 54, 57, 58, 59, 62, 63, 64, 65, 66, 67, 69, 71, 79, 80, 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 96, 98, 99, 100, 103, 104, 105, 106, 107, 108, 109, 110, 111, 113, 114, i 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 128, 129, 130, 133, 134, 135, 136, 137, 138, 139, 140, 143, 146, 150, 162, 163, 165, 168, 169, 173, 175, 180, 182, 183, 184, 186, 194, 195, 196, 206, 207, 208, 217, 218, 221, 222, 225, 226, 231, 240, 252, 258, 260, 261, 262, 263, 266, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 282, 283, 284, 286, 304, 305, 306, 307, 308, 309, 310, 311, 313, 410, 427, 432, 434, 439, 443, 444, 446, l 469, 470, 477, 479, 481, 483, 486, 487, 488, 492, 498, 499, 500, 505, 507, l 508, 512, 516, 517, 518, 525, 526, 527, 528, 531, 533, 534, 535, 537, 540, j 542, 543, 545, 546, 547, 548, 549, 550, 551, 552, 553, 555, 556, 557, 558, 559, 561, 562, 563, 564, 565, 566, 567, 570, 572, 573, 574, 575, 576, 577, 582, 583, 585, 586, 589, 594, 596, 600, 601, 602, 604, 605, 606, 608, 609, I 611, 612, 613, 614, 615, 627, 629, 643, 644, 645, 646, 647, 649, 650, 651, 652, 653, 654, 655, 656, 659, 660, 663, 665, 666, 667, 668, 669, 670, 671, ,
672, 673, 674, 675, 676, 678, 679, 680, 681, 682, 683, 691, 692, 696, 698, 699, 703, 707, 708, 709, 710, 719, 720, 721, 726, 727, 728, 729, 730, 732, 733, 737, 738, 739, 741, 742, 754, 755, 758, 759 TOTAL 288 HED's TO BE CORRECTED BY PLANT PERSONNEL
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V 152, 187, 192, 198, 238, 285, 406, 407, 411, 418, 421, 438, 450, 451, 456, 482, 484, 511, 622, 632 TOTAL 20 l
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() HED's INCLUDED IN THIS STUDY E. HED's- INSTRUMENT MODIFICATIONS 1, 15, 25, 39, 41, 42, 68, 72, 73, 76, 78, 167, 193, 197, 204, 228, 233, !
234, 235, 243, 244, 245, 254, 255, 259, 330, 331, 408, 409, 414, 433, 435, i 436, 437, 440, 441, 442, 445, 447, 468, 475, 476, 489, 490, 501, 503, 509, 519, 536, 595, 617, 618, 619, 620, 623, 717, 746, 749, 752, 756 TOTAL 60 F. HED's- ANNUNCIATORS i
295, 296, 297, 298, 299, 300, 301, 302, 303, 316, 317, 318, 319, 320, 321, 322, 333, 372, 390, 391, 392, 395, 431, 471, 472, 480, 513, 529, 580, 581, 628, 704, 705, 706, 714, 715, 745, 750 TOTAL 38 G. HED's- REMOTE SHUTDOWN PANELS 662, 693, 722, 734 1 I k TOTAL 4 l
H. CONTROL ROOM ENVIRONMENT NOISE: 325, 396 LIGHTING: 177, 179, 251, 429, 635, 636, 637, 638, 639, 740 HVAC: 430 TOTAL 13 l
I. RHR/RHRSW MPL # CHANGE 760
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TOTAL 1
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PANEL: 1H11-P600 and 2H11-P600 HED: 41, 72, 76 PROBLEM: These panels do not have the same layout between Units 1 and 2, Refueling Floor Vent Switch C/D is improperly located, and the controls and displays are not logically ordered.
ANALYSIS: Panels (1&2) Hil-P600 contain various radiation monitoring recorders and switches. The differences in panel layout between lH11-P600 and 2H11-P600 are due to different instrumentation that exists on the panels. The similar instruments are positioned such that relative locations between the two panels are the same. The panels have been reviewed for functional grouping. Several switches on the panels are improperly located resulting in a confusing layout.
Some witches should be rearranged so that similar items are located in the same position on each panel and nearer to their associated recorders.
RECOMMENDATION: Relocate the 1H11-P600 REFUELING FLOOR VENT C<3 switch directly to the right of REFUELING FLOOR VENT / /B s
switch.
Relocate the 2Hil-P600 REFUELING FLOOR VENT C/D switch directly to the right of REFUELING FLOOR VENT A/B G switch.
IMPLEMENTATION: December 31, 1990 i
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PANEL: 2Hil-P600
-HEG: 233, 244 PROBLEM: The printed values are not legible and there is no distinction between the markings on recorder 2D21-R600A.
ANALYSIS: This General Electric recorder is a high maintenance c, item and replacement parts are no longer available.
This instrument is an excellent candidate for the recorder replacement program. .
RECOMMENDATION: This recorder should' be replaced with an L&N Series 250 recorder.
IMPLEMENTATION: December 31, 1989 1
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PANEL: lH11-P600 and 2H11-P600
,A HED: 618 N.
PROBLEM: The channel plotted is not clearly displayed on recorders 1021-R600,1021-R900, and 2021-R600A.
ANALYSIS: These instruments are various radiation monitoring recorders . 1021-R600 has point select capability.
1021-R900 was recently replaced by DCR 84-182 and now has point select capability. 2021-R600A has been recommended to be replaced by HED's 233 and 244 for other reasons as well as this HED.
RECOMMENDATION: Replace recorder 2021-R600A in accordance with HED's 233 and 244.
IMPLEMENTATION: December 31, 1989 i
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I PANEL: 1Hil-P601 and 2H11-P601 i i
HED: 39 {
r~'g 1 (j PROBLEM: The Unit 1 and Unit 2 panels do not have the same layout. j ANALYSIS: The functional grouping of these panels is acceptable. The panel basically contains components for isolation valves, HPCI, Core Spray Div. II, RHR Div. II, RHR Div. I, and Core Spray Div. I. Comparing the layout between Unit 1 and Unit 2 l identifies several discrepancies:
Switches 821-S76A/B do not exist on the Unit 1 panel. This is because the check valves in the Unit 1 line are not motor operated; therefore, controls are not necessary.
Switches for R24-S018, S623A/B and instrument R44-5003 are 4 for 600 VAC R24-S018A/B and could be relocated to panel ]
H11-P652. However, there is no space available. l Switches E21A-S16A,B are labeled as the Jockey Pump A inboard valve F070A and the Jockey Pump B outboard valve F0698, respectively. Switches E21A-S15A,8 are labeled as the Jockey Pump B inboard valve F070B and the Jockey Pump A outboard valve F0698, respectively. These switches do not appear on the Unit 2 panel because the valves do not exist in the Unit
. 2 Jockey Pump system.
Switches E218-S3A/B are labeled as Jockey Pump E21-C003A/B, respectively. These switches do not appear on the Unit 1 s) panel because the C003A/B Jockey Pumps do not exist in the Unit 1 Jockey Pump system.
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RECOMMENDATION: No modifications are required for 1H11-P601.
Relocate Core Spray Reset switches on 2H11-P601 as shown to conform with 1H11-P601 layout.
l IMPLEMENTATION: December 31, 1990 6
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PANEL: 2Hil-P601 HED: 167 ip) PROBLEM: The 2 Ell-R600A&B heat exchanger controls are not designed to facilitate precise control where fine adjustments are required.
ANALYSIS: 2 Ell-R600A&B are the RHR heat exchanger differential pressure controllers. They are used to maintain a differential pressure between the RHR service water and RHR water in the heat exchanger. The differential pressure is maintained by throttling RHRSW valve 2 Ell-F068A (B). The controller is a self-synchronizing basic control station supplied by General Electric. This same control station is used in the same application on Unit 1, and for other throttling valves in the plant. Discussions with plant operations personnel indicated the controller is adequate and does not present any operational problems. Since this HED originated from the 1981 survey and does not appear for identical controllers used elsewhere, this HED does not present a valid consideration for a controller replacement.
RECOMMENDATION: Leave the controller as is.
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E____._________
i PANEL: 1H11-P601 and 2H11-P601 HED: 475 PROBLEM: The RHRSW pressure indicators are on (1&2) H11-P650 while the l RHRSW pump controls are on (l&2) H11-P602. The existing position of the subject controls and instrumentation of the RHRSW system warrants two operators to operate the system.
ANALYSIS: The RHRSW pressure indicators, E11-R650A&B for Unit 2, and E11-R500 and E11-R901 for Unit 1, are located on the H11-P650 panels. These indicators monitor the pressure in the main header for each division. In order to operate the pumps properly, this data is needed. Presently, twc operators are required to operate the pumps. Communicating across the control room during an emergency condition could present erroneous results. The implementation of this modification should enhance system performance.
RECOMMENDATION: Relocate RHRSW pressure indicators E11-R900 and E11-R901 to 1H11-P601 f rom 1H11-P650.
Relocate RHRSW pressure indicators 2E11-R650 A&B to 2H11-P601 f rom 2H11-P650.
IMPLEMENTATION: December 31, 1990 0
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10 O ,
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PANEL: 1H11-P601 and 2H11-P60i HED: 536 ,
PROBLEM:
Group 2 isolation valves have no reset indication light. ,
ANALYSIS: The Group 2 ISOLATION VALVES RESET switch is also labeled
]
Group 1, 2, 5 (switch S33 on H11-P601 and 532 on H11-P602).
S33 does not have an indication light for either group isolation. Whenever there is a group isolation signal initiated, primary containment isolation valves control logic is initiated. The relay logic of the isolation signals are autou tically reset. The controls for each individual valve have to be operated in order to reset the control logic. The.
isolation valve's position indicators are shown on the assembly display panel as well as above each individual valve control. Adding on indicating light for the group isolation reset switch would not provide a justifiable enhancement to the panel.
RECOMMENDATION: Do not add an indicating light.
O l
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PANEL: 1H11-P601 and 2H11-P601 HED: 595 PROBLEM: Replace non-linear scales with linear scales for flow indicators E11-R602 (A&B) and E21-R601 (A&B).
ANALYSIS: Ell-R602 measures RHP.SW flow (0-10,000 gpm) and E21-R601 measures core spray flow (0-7,000 gpm). Both of these systems operate in ranges which are readable on the indicators (mid-scale for E11-R602 and upper-scale for E21 -R601 ) . Changing to linear scales to enhance the lower range of the indicator scale would not provide any benefit.
In addition, the surface enhancements program will add tick marks and color banding to further highlight the operational ranges of the indicators.
RECOMMENDATION: Do not change to linear scales.
O 12 O
PANEL: 1H11-P601 and 2H11-P601 HED: 756 PROBLEM: Add valve position indication lights to the drain pot drain valve, E41-F053.
ANALYSIS: When a high level is reached in the HPCI exhaust line drain pot, level switch E41-N018 signals an alarm in the Main Control Room and activates valve E41-F053 to oper.. If this alarm does not clear, procedure 34AR-601-046-2 requires the operator to verify the position of E41--F053 and then manually operate E41-F070 in order to reduce the drain pot level. If there were position indicators for valve E41-F053 in the Control Room, the operator could verify valve position prior l to locally operating valve E41-F070. However, if the alarm l for high pot level does not clear, knowing the position of E41-F053 prior to leaving the Control Room to operate E41-F070 is of little importance.
RECOMMENDATION: Do not add indication lights.
O 13 O
PANEL: 1H11-P601 and 2H11-P601 HED: 285, 301, 472, 529
() PROBLEM: Annunciators are not grouped together within an annunciator box by systems, annunciators are not grouped above related controls, and RX BLDG VENT EXHAUST HIGH RADIATION is out of place and hard to find.
ANALYSIS: The H11-P601 panel consists mainly of process radiation monitoring, area radiation monitoring, HPCI, Core Spray II, RHR II, RHR I, and Core Spray I.
The objective is to position the annunciators in the same arrangement as the systems appear on the panel. In order to achieve this, all annunciators which deal with radiation l monitoring are grouped together. They will be found in annunciator boxes (a.b.) #1 and #2. All remaining annunciators are grouped by system and arranged as they appear on the panel.
However, the following annunciators which are located on panel H11-P650 should be relocated to the H11-P601 panel.
RHRSW BRG HIGH TEMP DIV I STRAINER ALARM .
.s DIV II
- STRAINER ALARM The following annunciator which is located on panel H11-P603 should be relocated to H11-P601 (Unit 1 only)..
HPCI ISOLATION VLV F002/F003 NOT FULL) OPEN The following annunciator which is located on panel H11-P657 should be relocated to H11-P601 (Unit 1 only) 821-R623A/B IN HIGH SPEED MODE Presently, there is no available space on H11-P601. The Unit 2 annunciators could be reduced by combining signals, but this method would violate NUREG-0700 for multiple inputs.
Even.if this method of reducing annunciators was acceptable it could not be achieved on Unit 1 since it has no signals that could be combined. Therefore, these annunciators will have to remain in their present position.
The REACTOR BUILDING VENT EXHAUST HIGH RADIATION annunciator window-(for Unit 2 only) will be relocated to annunciator box
- 2. This relocation groups the subject annunciator.with its Hi-Hi counterpart, REACTOR BUILDING VENT EXHAUST HI-HI RAD, O as well as other similar annunciators.
RECOMMENDATION: Regroup the annunciators as shown.
IMPLEMENTATION: December 31, 1989 O
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(~ RADWASTE SBGT DRYWELL REFUELING EFFLUENT AND TORUS VENT EXHAt HIGH RADIATION HIGH RADIATION HI-HI RAD SERVICE WATER REACTOR BLDG. REFUELING EFFLUENT VENT / SEGT VENT EXHAf HIGH HADIAl10N DOWNSLALL HIGH HADI-REACTOR BLDG. REACTOR BLDG. REFUELING CLOSE COOL WTR ACCESS VENT VENT EXHA' HIGH RADIATION HIGH RADIATION DOWNSCALE LIOUID PROCESS REACTOR BLDG REFUELING DOWN5CALE POT CONTAMINATE VENT FILT.
OR INOPERATIVE HIGH RADIATION DISCH HI I
('
MAIN STEAM LINE RX BLDG POT REFUELING HIGH RADIATION CONTAM AREA VENT FILT!
VENT HI-HI RAD DISCH LOW l' rg,[ MAIN STEAM LINE RX BLDG VENT RX ELD VEi DOWN5CALE FILTER DISCH. HI / LOW f A P I?Il W M HIGH RADIATION DNSC OR If C/dlO l
Aho Availr.blo On Aperture Card I
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- . . - - - - - - . . . ~ . . - . - . p -.
FLOOR TURBINE BUILDING POSTTREATMENT OFF GAS AVG ANN VENT FILTER JST OFF GA5 HI-HI-HI REL LIMIT WILL
[ATION INTAKE HI RAD RAD OR INOP BE EXCEEDED iFLOOR TURBINE BUILDING POSTTREATMENT OFF GAS VENT JST VENT FILTER OFF GAS HIGH - HIGH ki1UN D1$tH H1 HAD H1-H1 HAD1AI10N HAD1AI10N 1 l FLOOR TURSINE BUILDING POSTTREATMENT OFF GAS VENT lST VENT FILTER OFF GAS HIGH RADIATION DISCH LOW RAD HIGH RADIATION 1 i i
iFLOOR RETREATMENT POSTTREATMENT OFF GA5 VENT
[R OFF GA5 0FF GAS DOWN5CALE OR HI-HI RADIATION DOWNSCALE INOPERATIVE FAD l
l FLOOR RETREATMENT POSTTREATMENT OFF GAS OFF GAS VENT
[R OFF GAS SAMPLE l RAD SAMPLE DOWNSCALE OR INOP HIGH / LOW FLOW HIGH / LOW FLOV
\
lT MON RETREATMENT CARSON SED CARBON BED l LOW OFF GA5 SAMPLE VAULT VAULT l0P HIGH / LOW FLOW HIGH RADIATION LOW RADIATION
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AREA FISSION PRODUCT RADWASTE BLDG.
f' PARTICULATE HIGH RADIATION
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INOP w E M STEAM LEAK FISSION PRODUCT RECOMBINER BLD DETECTION SYS. .s" GAS HIGH RADIATION!
3 LOGIC IN TEST HIGH RADIATION STATUS w M
i STEAM LEAK FISSION PRODUCT RADWASTE ADDITJ DETECTION SYS. "B" DOWNSCALE HIGH RADIATION i LOGIC IN TEST STATUS
- M A'^ '
DIFFERENTIAL CONTROL ROOM NEW FUEL TEMPERATURE OUTSIDE AIR INLET STORAGE AREA HIGH HIGH RADIATION HIGH RADIATION M M H
AMBIENT CONTROL ROOM WASTE GAS gp%N TEMPERATURE OUTSIDE AIR INLET TREATMENT BLD HIGH HIGH CHLORINE HIGH RADIATION gggD M N x paso ainus ,
Aperture 4
m RELOCATED
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i REACTOR BLDG HPCI AREA COND.5TORAGE TANK HIGH RADIATION TEMP LOGIC LOV LEVEL POVER FAILURE M M M REFUELING FLOOR HPCI TURBINE HPCI STEAM
$A AREA TRIPPED LINE DIFF.
HIGH RADIATION PRESSURE HIGH E E *
- 5. TURBINE BLDG. HPCI TUR8INE HPCI ISOLATION HIGH RADIATION TRIP SOLENOID TIMER INITIATED ENERGIZED M X x (FROM iHI i-P6%)
l
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M
- M HPCI SYSTEM HPCI ISOLATION HPCI TURBINE INVERTER CIRCUIT TRIP LOGIC "B" EXHAUST DISCH l FAILURE INITIATED PRESSURE HIGH u " M HPCI LOGIC SUPPRESSION HPCI TURBINE
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HPCI TURBINE )
HPCI HPCI IN TEST BAROMETRIC COND. BAROMETRIC COND.
STATUS PRESS. HIGH LOW LEVEL
\
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HPCI AUX. OIL HPCI HPCI TURBINE DISCHARGE INLET DRAIN POT PUMP MOTER
( OVERLOAD LOW FLOW. l LEVEL HIGH
- w w
HPCI VALVES HPCI TURBINE CORE SPRAY MOTOR OVERLOAD BEARING OIL '5YSTEM II PRESS. LOW ACTUATED I
w w w ..
HPCI PUMP HPCI TURBINE CCRE SPRAY SUCTION PRESS. OIL COOLER SYSTEM II LOGIC LOW DISCH. TEMP PONER FAILURE HIGH i
HPCI OIL CORE SPRAY .j HPCI PUMP SUCTION FILTER DIFF. SYSTEM II ]v PRESS.HIGH VALVE 5 OVERLOAD PRESS. HIGH l w w w
HPCI OIL CORE SPRAY HPCI BAROMETRIC TANK LEVEL HEADER 'B" TI COND. LEVEL HIGH / LOW FAILURE IF HIGH p.PEB.Tt1RE >9 PSIG w
C'ARD
- w Also Available On Aperture Card NOTE: DELETE HPCI, OVERLOAD TO w RELOCATED
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l RHR RELAY RHR PUMP "B" CORE SPRAY WALVE "B" LOGIC "B" TRIP DISCH. PRESS POWER FAILURE HIGH !
m w 2
RHR RHR PUMP "B" CORE SPRAY CROSS TIE VALVE OVERLOAD OR LINE "B" EII-FOIO OPEN LOCKOUT RELAY LOW LEVEL TRIPPED w w p
CORE SPRAY SERVICE WATER JOCKY PUMP SYS.
PUMP "B- PUMP "B" TRIP LOW WATER LEVEL TRIP w w g
CORE SPRAY RHR LOOP "B" RHR PUMP "B" OVERLOAD INJECT VALVES SERVICE VATER '
OR LOCKOUT RELAY OVERLOAD PUMP "B" OVERLOAD l TRIPPED
. CORE SPRAY TUBE TO SHELL VALVE 5 IN TEST PRESS. LOW OVERLOAD STATUS
" w w
RHR CONT SPRAY "B" RHR CONT l SYSTEM II INJECT VALVES SPR AY OR SERVICE OVERLOAD WATER PUMP ACTUATED i SEL IN OVERRIDE
- w w INJECTION VALVES MOTOR lBE LIXE UNIT 2 IHiI-P601-9 ,
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RHR PUMP "D~ RHR HX "A" OR "B" RHR LOOP "A"
) TRIP OUTLET VALVES HI CONDUCTIVITY OVERLOAD x x RHR PUMP "D" RHR SYSTEM DISCH. CONT SPRAY OVERLOAD OR & SHUTDOWN "A" INJECT LOCKOUT SUCTION HDR5 VALVES OVERLOAD RELAY TRIPPED HI PRESS.
x
- RHR RHR RHR l SERVICE WATER SYSTEM I PUMP "A" l TRIP PUMP "D" TRIP ACTUATED u n w RHR SERVICE RHR RHR PUMP "A" WATER PUMP "D" RELAY LOGIC "A" OVERLOAD OR OVERLOAD POWER FAILURE LOCKOUT RELAY TRIPPED
- w x RHR HX "A" OR "B" RHR LOOP "A" RHR DISCH COOLING JOCKY PUMP SERVICE WATER WATER SYSTEM LOW PUMP "A" HIGH TEMP WATER LEVEL TRIP w u w "B" RHP, RHR HX "A" OR RHR LOOP "A"
'APEIUll INLET WATER INJECT VALVES SERVICE WATER p, AT(D HIGH TEMP OVERLOAD PUMP "A" OVERLOAD Also Available On Aperture Card
- RELOCATED v ~
I-RHR HX "A" DRYWELL CORE SPRAY TUEE TO SHELL HIGH PRESS. SYSTEM I i
' PRESS LOW INIATION VALVES OVERLOAD
'" w w
lRHR REACTOR CORE SPRAY IN TEST STATUS LOW LEVEL HEADER "A" INIATION FAILURE IF i > 900 PSIG
" w v
RHR REACTOR CORE SPRAY PUMP "C" PRESS LOV VALVE "A" TRIP 500 PSIG HIGH DISCH y x PRESSURE 1
RHR PUMP "C" REACTOR CORE SPRAY OVERLOAD OR LOW LEVEL LINE "A" LOCKOUT LOW LEVEL RELAY TRIPPED
- x x
I RHR CORE SPRAY CORE SPRAY SERVICE VATER SYSTEM I PUMP "A" PUMP "C" ACTUATED TRIP TRIP w w lm RHR CORE SPRAY CORE SPRAY SERVICE VATER SYSTEM I PUMP "A" PUMP "C" LOGIC POWER OVERLOAD OR OVERLCAD FAILURE LOCKOUT RELAY w w TRIPPED
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h RADWASTE EFFLUENT SBGT DRYWELL AND TORUS REFUELING FLOOR VENT EXHAUST HIGH RADIATION ^HIGH RADIATION HI-HI RADIATION SERVICE WATER REACTOR BLDG. REFUELING FLOOR
, EFFLUENT VENT / SEGT VENT EXHAUST HIGH RADIATION DOWNSCALE HIGH RADIATION e
e REACTOR BLDG. REACTOR BLDG. REFUELING FLOOR CLOSE COOL WTR ACCESS VENT VENT EXHAUST HIGH RADI'ATION HIGH RADIATION DOWNSCALE ;j
- l g q d -
l LIQUID PROCESS REACTOR BLDG REFUELING' FLOOR .
7 DOWNSCALE POT CONTAMINATE VENT FILTER OR INOPERATIVE HIGH RADIATION 3 DISCH HI RAD d., I
,' MAIN STEAM !!INE RX BLDG POT REFUELING FLOOR
, HIGH RADIATION CONTAM AREA VENT FILTER j VENT HI-HI RAD DISCH LOW RAD J f' M Q MAIN STEAM LINE DOWNSCALE RX BLDG VENT FILTER DISCH.
RX BLD VENT MON HI' / LOW FLOW tulle HI.GH RADIATION DNSC OR INOP CARO 1 Also Available On 1
Aperture Card I
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- RELOCATED L /
_1~ - - - - - - - - - - - - - - - -- - - - - - - - - - - - _ _ _ - - - - - - - - - -d
s TURBINE BUILDING POSTTREATMENT OFF, GAS AVG ANN 3 VENT FILTER OFF GAS HI-HI-HI REL LIMIT WILL INTAKE HI RAD RAD OR INOP BE EXCEEDED ,
TURBINE BUILDING POSTTREATMENT RACWA5TE VENT VENT FILTER OFF GAS INLET DISCH. ,
DISCH HI RAD HI-HI RADIATION HI RADIATION 1
TURBINE BUILDING POSTTREATMENT RADWASTE VENT VENT FILTER OFF GAS ~
INLET DISCH.
DISCH LOW RAD HIGH RADIATION DOWNSCALE
' RETREATMENT POSTTREATMENT RADWASTE VENT OFF GAS OFF GAS OUTILET DISCHARGE HI-H1 RADIATION _ DOWNSCALE HI fADIATION - -
g RETREATMENT POSTTREATMENT RAD' WASTE VENT OFF GAS OFF GAS SAMPLE OU ' El DISCHARGE '
DOWN5CALE OR INOP HIGH /' LOW FLOW DO 45CALE I ,
L RETREATMENT CARBON EED CAFEON BED '
OFF GA5 SAMPLE VAULT VA T HIGH / LOW FLOV HIGH RADIATION L O' RADIATION i
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AREA RADWASTE BLDG. REACTOR BLDG MONITORS HIGH RADIATION HIGH RADIATION DOWN5CALE w n w
RX BLDG. REFUELING FLOOR REACTOR BLDG.
VENT EXHAUST AREA VENT EXHAUST HI RADIATION HI-HI RADIATION HIGH RADIATION
" " x I
STEAM LEAK B2f-R629 A/B TURBINE BLDE.
DETECTION SYS "A" IN HIGH SPEED HIGH RADIATION LOGIC IN TEST
- MODE STATUS x x y
STEAM LEAK TIP MACHINE VASTE GAS f TREATMENT BLDG DETECTION SYS "B" RADIATION LOGIC IN TEST HIGH RADIATION STATUS l - -
!of - _.
HPCI VACUUM DIFFERENTIAL i MACHINE SHOP l #
BREAKER VALVES TEMPERATURE ,
HI RADIATION NOT FULLY OPEN HIGH f w w D HPCi STEM AMBIENT MAIN STACK 11'[D HI GAMMA INVERTER CIRCUIT TEMPERATURE
("g* gg HIGH RADIATION FAILURE w
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, x x \
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x x RHR RELAY LOGIC RHR PUMP "B" RHR PUMP "D" "B" POWER FAILURE TRIP TRIP x x !
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- 2H I I -P601 -t4 29 3 g [j 1 () 5 0584'I %
PANEL: 1H11-P601 and 2H11-P601
{
HED: 745 G
Q PROBLEM: Several annunciator alarm windows have multiple inputs.
ANALYSIS: POSTTREATMENT OFFGAS HI-HI-HI RAD OR INOP Units 1 & 2 If this alarm is received in the MCR, the operator observes the Process Radiation Monitors at panel H11-P604. If one monitor has tripped then a radiation sample is taken to determine if:
A. A radiation problem exists B. The monitor is inoperable If both radiation monitors trip then the reactor is scrammed.
Since the operator must review the monitors to determine what actions must be taken,.it will not be necessary to separate )
the inputs to the subject annunciator. '
RETREATMENT OFFGAS DOWNSCALE OR INOP Units 1 & 2 j If this alarm is received in the MCR, the operator must-observe-recorder R601 on panel H11-P601 to determine if the -
PRM is inop or downscale. Separation of the inputs will not be necessary since the recorder will be utilized to determine what further actions are necessary. -
POSTTREATMENT OFFGAS SAMPLE HIGH/ LOW FLOW Units 1 & 2 PRETPEATHENT OFFGAS SAMPLE HIGH/ LOW FLOW Units 1 & 2 0FFGAS VENT SAMPLE HIGH/ LOW FLOW Unit 1 BUILDING VENT SAMPLE HIGH/ LOW FLOW Unit 1 HPCI DIL TANK LEVEL HIGH/ LOW Units 1 & 2 These multiple input alarms'do not require separation since the condition of either high or low cannot exist at one time. The operator must take an intermediate step to determine exactly what problem exists. The intermediate step is dictated by the Annunciator Response Procedures (ARP).
RHR CONT SPRAY OR SW PUMP SEL IN OVERRIDE Unit 1 & 2 This alarm notifies the operator that the two containment spray valves or the RHRSW pump control' selectors are in the manual override position. It is not necessary to separate the two inputs since the switches are located on the P601 panel.
1 24 i
HFCI ISOLATION VALVE F002/F003 NOT FULLY OPEN Unit 2 If this alarm is received in conjunction with the HPCI ISOLATION SIGNAL LOGIC A & B annunciator, the HPCI Isolation O trip signal is initiated. If this alarm is received in conjunction with the HPCI ISOLATION SIGNAL LOGIC "A" alarm o'r "B" alarm only, steps are taken'to reset the HPCI system.
Therefore, separating inputs is not necessary since annunciators are used to assist the operator in determining the problem.
CORE' SPRAY PUMP A OVERLOAD OR LOCK 0UT RELAY Units 1 & 2 )
CORE SPRAY PUMP B OVERLOAD OR LOCK 0UT RELAY Units.1 & 2 Once this alarm is received the CS system I or II is considered inoperable. Therefore, separation is not necessary since both of the conditions stated on the annunciator produce the same result. j I
1 RHR PUMP A OVERLOAD OR LOCK 0UT RELAY TRIPPED Units 1 & 2 RHR PUMP B OVERLOAD OR LOCK 0UT RELAY TRIPPED Units 1 & 2 j RHR PUNP C OVERLOAD OR LOCK 0UT RELAY TRIPPED Units 1 & 2 1 RHR PUMP D OVERLOAD OR LOCK 0UT RELAY TRIPPED Units.1 & 2 Once this alarm is received the subject RHR pump is considered inoperable. Therefore, separation is not necessary since both of the conditions stated on the annunciator produce the same O result.
RHR HX A OR B INLET WATER HIGH TEMP Units 1 & 2 RHR HX A OR B OUTLET HI CONDUCTIVITY Unit 1 RHR HX A OR B DISCH COOLING WATER HIGH TEMP Unit 2 E. I. Hatch is designed to utilize one loop of RHR at a time, except for the Containment Cooling mode which may use two. If only one division of RHR is operable, then the associated heat exchanger will be the one in question. However, in the latter i case, the operator must depend on instrumentation to determine which heat exchanger is in trouble. If. annunciator RHR HX-A or B INLET WATER HIGH TEMP or RHR HX A or B DISCHARGE COOLING WATER - HIGH TEMP alarms, recorder E41-R605 at panel Hil-P614 determines which heat exchanger is having problems. .If I annunciator HX A or HX B OUTLET HI CONDUCTIVITY alarms, !
conductivity indicator, E11-R001 A (B), is used to confirm the i possible condition. Therefore, separation is not necessary 1 due to system design and available instrumentation.
1 25 )
O 1
4
B21-R623 A/B IN HIGH SPEED MODE Unit 2 If this alarm is received in conjunction with PRIMARY CONTAINMENT HIGH PRESSURE alarm, then a set of corrective g) b actions are taken dictated by the procedures. If this alarm is received in conjunction with LOW LOW LEVEL alarm, then another set of corrective actions are taken dictated by the procedures. If the alarm is received alone and all other parameters are ncrmal, then the alarm is reset. Input is not !
necessary since annunciators are utilized to assist operators in determining the problem.
RHR LOOP A INJECT VALVES OVERLOAD Units 1 & 2 RHR LOOP B INJECT VALVES OVERLOAD Units 1 & 2 RHR LOOP A VALVES OVERLOAD Units 1 & 2 l RHR LOOP B VLAVES OVERLOAD Units 1 & 2 j HPCI INJECT VALVES MOTOR OVERLOAD Units 1 & 2 {
HPCI VALVE MOTOR OVERLOAD Units 1 & 2 i CONT SPRAY A INJECT VALVES OVERLOAD Units 1 & 2 i CONT SPRAY B INJECT VALVES OVERLOAD Units 1 & 2 I CORE SPRAY SYSTEM I VALVE OVERLOAD Units 1 & 2 !
CORE SPRAY SYSTEM II VALVE OVERLOAD Units 1 & 2 j j
These annunciators notify the operator that valves have failed to operate or have stopped in an intermediate position. Each ;
annunciator receives input from two or more valves. However, 1 the operator can determine which valve is the problem by the valve indicating lights located on the Hil-P601 panel. If both indicating lights of a particular valve are illuminated
(.)
at the time of the alarm, then the operator can take the necessary corrective actions as dictated in the ARP. )
Therefore, it can by concluded that separation is not required.
1 RX BLDG VENT MON HI/ LOW FLOW ONSC OR INOP Unit 2 )
LIQUID PROCESS 00WNSCALE OR INOPERATIVE Units 1 & 2 0FFGAS VENT 00WNSCALE OR INOPERATIVE Units 1 & 2 Dil-RIS-K619 RX BLDG STACK HI RADIATION /INOP Unit 1 Once these alarms are received the operator checks local recorders to determine if the monitors are downscale or inoperative. Based on the data collected, the operator takes the appropriate action dictated by the ARP. Therefore, it is not necessary to separate the inputs going to each of the subject annunciators.
RECOMMENDATION: Alarm separation is not required.
26 V
PANEL: 1H11-P602 and 2H11-P602 HED: 15, 39 r
( PROBLEM: The height of B21-56A (ADS Low Wtr Level Actuation A/C Reset) and B21-S6B (ADS Low Wtr Level Actuation B/D Reset) is at 65 !
inches, which exceeds the limit of 60 inches, and the Unit 1 and 2 panels do not have the same layout.
ANALYSIS: The B21-S6A, 8 pushbutton switches are used for ADS low water level actuation reset. These switches are the pushbutton type which require a single, deliberate, depressing action by an operator. Lowering the switches five inches would not provide any additional benefit since the switches can be reached and due to the simple action required by the operator.
A review of lHil-P602 and 2Hil-P602 indicates that the panels have the same layout and design, except for the following controls that are on the Unit 2 panel that are not on the Unit 1 panel:
- RCIC Manual Initiation pushbutton
- Steam to Turbine Bypass Valve 2E51-F119 keyswitch
- Pri Cntmt Isin Chk Viv B21-F077A control switch
- Pri Cntmt Isin Chk V1v B21-F077B control switch These differences are minor and are due to the different system design between the two utiits. Therefore, no changes are required.
RECOMMENDATION: ' 9 ave the B21-56A,B pushbutton switches in their present
.0 cations. No other action is required.
27 o
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PANEL: 1H11-P602 and ~ 2H11-P602 408, 409, 441, 445, 489, 503, 509 HED:
PROBLEM: Drywell pressure and torus water level indications are needed on a front panel.
ANALYSIS: Drywell pressure and torus water level-(narrow range) currently exist on recorders-T48-R607A on H11-P657 and T48-R6078 on H11-P654. These two panels are located side by side. One of these recorders can be moved to front panel H11 -P602.
RECOMMENDATION: Relocate 1T48-R607A to 1H11-P602 from 1H11-P657.
Relocate 2T48-R607A to 2H11-P602 f rom 2H11-P657.
IMPLEMENTATION: December 31, 1990 0
30 0
PANEL: lH11-P602 and 2Hil-P602 HED: 295, 302, 447, 472 PROBLEM: Annunciators are not grouped within annunciator box by specific systems, the "B" Reactor Recirc Pump alarms are not located above their relative controls, the Low Low Set logic alarms on lHll-P657 should be on lH11-P602, and the annunciators should be reevaluated for functional grouping.
ANALYSIS: The annunciators are grouped as well as they can be given the number of annunciators required per system and the space limitations of the annunciator boxes. The annunciators for I various systems are grouped together, such as recirc pump "A", recirc pump "B", RWCU, RCIC, and ADS. The recirc pump "B" alarms are not directly over the recirc pump "B" controls due to physical space limitations of the panel. The best I solution is to group the annunciators f rom left to right just as the controls are grouped f rom lef t to right. Due to the l size of the annunciator boxes, the recirc pump "B" l annunciators cannot be directly above the controls. However, j the annunciators are located sufficiently close to not present an operational problem.
The Low Low Set / Manual Relief Valves 1821-F013A and 1821-F013B have their controls and reset switches on i 1H11-P602, Panel B, above the auto blowdown controls. Low Low Set / Manual Relief Valve 1821-F013G also has its control n switch on 1H11-P602 under the other Low Low Set switches.
( The Low Low Set Logic Alarms should be moved from 1H11-P657 to Panel lH11-P602 to a location as close to the switches as possible. The Lcw Low Set Logic controls for Unit 2 are already located on 2Hil-P602.
The Unit 1 and Unit 2 annunciator window layouts are basically the same; hnwever, there are some dif ferences. The most noticeable is that 2H11-P602 has four (4) annunciator window boxes while 1H11-P602 has three (3). In addition, the Unit 1 boxes are spread apart whereas the Unit 2 boxes are located closer together. This is the primary reason for the annunciators for recirc pump "B" not being located above its controls.
The Reactor Building and Drywell Floor Drain & Equipment Sump alarms and the Reactor Water Clean-up alarms have been located in this fourth box as have Containment High Radiation and Fission Product High/ Low Flow. The Unit 2 panel also contains two columns of MSIV alarms and several alarms for the Recire. Loops and Fission Products that are not in the Unit 1 panel.
31
Continued PANEL: 1H11-P602 and 2H11-P602 HED: 295, 302, 447, 472 i ANALYSIS: Since HED 447 required movement of four alarms to panel (con't.) 1H11-P602, which currently has no space available, a new annunciator window box will have to be added and the Unit I annunciators rearranged to correspond to the Unit 2 panel as closely as possible. This will include some changes to the i Unit 2 panel as well. The Low Low Set alarms should be relocated closer to the ADS alarms and controls, and the Recirc alarms that are combined A and B loop should be located between the A loop alarms and the B loop alarms.
RECOMMENDATION: Add a fourth 6 x 6 annunciator window box to l'H11-P602 between P602-1 and P602-2, and regroup the windows as shown.
IMPLEMENTATION: December 31, 1989 O .
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DRIVE ~ MOTOR "A" FLUID DRIVE "A" GENERATOR "A" LUBE OIL FIELD' GROUND OVESLOAD PRES 5 LOW l
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L RECIRC. LOOP "A" DRIVE MOTOR "A" FLUID DRIVE "A" INTERNAL AIR SCOOP TUBE OUT.0F SERVICE TEMP HIGH LOCK l
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DRIVE MOTOR "B" FLUID DRIVE "B" ' GENERATOR "B "
OVERLOAD LUBE OIL FIELD GROUND PRESS LOW DRIVE MOTOR "B" OIL MIST GENERATOR "B" GROUND ELIMINATOR INTERNAL AIR D/P HIGH "B " TEMP HIGH DRIVE MOTOR "B " FLUID DRIVE "B" RECIRC LOOP "B "
INTERNAL AIR SCOOP TUBE LOCK OUT OF SERVICE y TEMP HIGH 4
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OUTER SEAL "B" LOW LOW SET POMP "B" MOTOR LEAK DETECTION LOGIC A/C WINDING COOLING HIGH FLOW LOSS OF POWER -WTR FLOW LOW w (FROM 2H i l -P601 )
PUMP "B" LOW LOW SET MG SET "B" COOLER SEAL STAGING LOGIC A/C HOUSING LEAK OR FLOW HIGH/ LOW ARMED COND GUILD-UP x (FROM 2Hi i PGOI )
PUMP "B" LOW LOW SET i SUPPRESSION CLOSED COOLING LOGIC B/D ,
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RECIRC FLOW "B" LOW. LOW SET LIMIT CCND STORAGE LOGIC 8/D TANK LOW LEVEL ARMED (RCIC) x (FROM 2H i l -P601 )
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CLEANUP DISCH REACTOR BLDG DRYWELL FLOOR FLOOR DRAINS DRAINS SUMP PRESS HIGH/ LOW SUMP "B" HI LEAK HIGH LEAK l
REACTOR BLDG DRYWELL EQUIP CLEANUP PUMP EOUIP DRAINS DRAINS SUMP COOLING VATER SUMP HIGH TEMP HIGH HIGH LEVEL TEMP REACTOR BLDG DRYWELL EOUIP CLEANUP EQJIP DRAINS DRAIN 5 SUMP SYS LEAK SUMP HIGH TEMP HIGH LEAK RADWASTE DRYWELL EQUIP CLEANUP CONTROLLER NO.I DRAINS SUMP FILTER INLET TROUBLE HIGH TEMP TEMP HIGH RADWASTE RADWASTE CLEANUP CONTROLLER NO. 2 CONTROLLER NO. 9 FILTER DEMIN TROUBLE TROUBLE FAILURE ryg APER'fURE CARD NOTE: ADD TORUS WATd (FROM 2Hi l-P6d Alw Availshle On PLANT HATCH Od Aperture Card SHOULD SELECT OR DELETE.
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j CLEANUP MSIV SEAL SYS CONTAINMENT HI PUMP LOW FLOW HEATER OVERLOAD RADIATION OR INOP INBOARD 1
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PANEL: 1H11-P602 and 2H11-P602 HED: 745 PROBLEM: Several alarms have multiple inputs.
ANALYSIS: LLS LOGIC A or C POWER LOSS LLS LOGIC B or D POWER LOSS The channel that is causing the annunciation can be easily determined by pressing the ALARM TEST LLS CH A (or B, C, 0) switch, and if both "LLS Armed Channel A (B, C, or D)" and "LLS Logic A or C (B or D) Armed" lights are on, then the channel is operable. This process can be continued to determine if and how many channels are out of service.
LLS LOGIC A or C ARMED LLS LOGIC B or D ARMED There is a possibility of two inputs simultaneously, but there are indicating lights for all SRV's to determine whether LLS is armed or whether there is system trouble.
CLEANUP DISH PRESS HIGH/ LOW l FISSION PRODUCT HIGH/ LOW FLOW l PUMP A SEAL STAGING FLOW HIGH/ LOW PUMP B SEAL STAGING FLOW HIGH/ LOW RECIRC PUMP A MOTOR OIL LEVEL HIGH/ LOW RECIRC PUMP B MOTOR OIL LEVEL HIGH/ LOW G These annunciators can only have one input at a given time.
Alarm separation would only add more windows to the panels.
Instrumentation is available to determine if the condition is high or low.
PUMP MOTOR A/B HIGH TEMP Since both recirculation pumps operate simultaneously, it is possible for this alarm to have more than one input.
However, indicators are available to determine which pump is experiencing problems and the nature of the alarm is not critical enough to warrant separation.
RECIRC PUMP A(B) PRESS / LEVEL TEST SWITCH ABNORMAL This annunciator indicates that the trip test switch is in thE test position on panel H11-P614 and it does not have multiple inputs.
41 0
Continued PANEL: 1H11-P602 and 2H11-P602 HED: 745 ANALYSIS: RECIRC PUMP A (B) HIGH PRESS / LOW LEVEL TRIP (con't.)
The result of these inputs is the same, i.e. the recirc pump has tripped. Indicators on H11-P602 and H11-P601 can then be used to determine the~cause of the trip.
RCIC ISOLATION VALVE F007/F006 NOT FULLY OPEN This annunciator can have two inputs simultaneously, but these inputs should not be separated because there are indicating lights on H11-P602 that provide position indication.
AUTO BLOWDOWN CS OR RHR PRESS' PERMISSIVE Two inputs to this window are possible,.but indicating lights are readily available to determine w'ich n pumps are operating.
CONTAINMENT HIGH RAD OR INOP-There are two possible inputs that could cause this alarm, but it is easily verified on panel H11-P645 by comparing indicator readings with recorder readings which have caused the alarm.
RECOMMENDATION: Alarm separation is not required.
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PANEL: 1H11-P603 and 2H11-P603 HED: 39, 68, 440 (g,/ PROBLEM: The panels do not have the same layout between Units 1 and 2, CRD pressure control on 2H11-P603 is on the vertical board, and the RFP discharge flow indicators are reversed on 1 H11 -P603.
ANALYSIS: On Unit 1 the Torus and Drywell vent valves are side by side and on Unit 2 they are one above the other. Since these are key-lock switches it would be difficult to make a mistake due to the differences between units. Therefore, no modification is required.
Unit 1 has two manual scram buttons and Unit 2 has four.
These buttons are used to manually scram the plant and are not used on a daily basis. Adding two more manual scram buttons on Unit 1 will not enhance the safety or operation of the plant. Therefore, no modification is required.
Switches for valves N21-F006A&B on Unit 1 are on panel lH11-P650 and for Unit 2 they are located on 2H11-P603. To provide easier system cperation, move Unit 1 switches from panel 1H11-P650 to 1H11-P603. ;
On 2H11-P603, the CRD pressure control is on the vertical board and the CRD flow control is on the benchboard. On !
1Hll-P603, both controllers are on the benchboard. Room is
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available to move 2011-F127 (CR0 pressure control) next to 2C11-R606 (CRD flow control). This simple change will i
resolve two HED's and provide better grouping.
i The Unit 1 RFP discharge flow indicators (N21-R927 and N21-R928) are located side by side on 1H11-P603. However, RFP "B" indicator is to the left of RFP "A". These two indicators should be swapped so that their locations conform to a population stereotype and the layout of 2H11-P603.
RECOMMENDATION: Relocate controls for N21-F006 ( A,B) to 1Hil-P603 f rom l lH11-P650. I Move 2C11-F127 controllers on 2H11-P603 f rom the vertical board to the benchboard. j Swap locations of N21-R927 and N21-R928 on 1Hil-P603.
Relocate FD WTR DP differential pressure indicator on 1Hil-P603 next to 1C41-R600 in order to match Unit 2.
IMPLEMENTATION: December 31, 1990 43
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PANEL: 1H11-P603 and 2H11-P603 -
HED: 73 PROBLEM: IRM range switches A through H are not logically ordered from lef t to right.
ANALYSIS: The IRMs are in the A through H order for their core locations. They are grouped "A,'C, E, G" and "B, D, F, H" because they are divisionally separated: "A, C, E, G" being fed from R25-S065, 24/48V DC Batt. Cab. 1A, and "B, D, F, H" being fed. f rom R25-S016, 24/48V DC Batt. Cab.18. This necessitates the order of the switches; therefore, no action is required.
RECOMMENDATION: No action required.
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I PANEL: 1H11-P603 and 2H11-P603 ,
HED: 437, 490 PROBLEM: The SRM and IRM controls have to be constantly held to be inserted af ter a scram.
ANALYSIS: To alleviate tb need of an operator to continuously hold the control switches, seal-in circuits can be added to the control logic. The operator would then only momentarily place the switch in the insert mode and it would continue to insert without having to hold the switches. An override function can also be provided for manual positioning.
RECOMMENDATION: Add seal-in circuits to the SRM and IRM controls.
IMPLEMENTATION: December 31, 1989 0 .
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PANEL: 1H11-P603 HED: 51 3 PROBLEM: The Turbine Building Pipe Chase area does not have a control
( room alarm on high temperature. At this time an operator must go to a number of different sources to gather data and then make a judgement call based on that data.
ANALYSIS: DCR 84-112 corrected this problem on Unit 2. Because of different Tech Spec requirements between the two units it was not necessary to make this change on Unit 1. The same design change on Unit 1 could correct this problem and make the two units much more similar. However, a smaller version of this design change could solve this problem and still make the two units more similar than they are now.
RECOMMENDATION: Add two independent and non-qualified temperature sensing elements and switches with separate alarms for each in the Main Control Room.
IMPLEMENTATION: December 31, 1990 I
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PANEL: lH11-P603 and 2H11-P603 295, 472 HED:
PROBLEM: Annunciators are not grouped together within an annunciator box by system.
ANALYSIS: The annunciator windows have been reviewed for grouping by system, and similarity between Unit 1 and Unit 2.
On Unit 1, the annunciators for the remote shutdown panels XFR switches are all on 1H11-P603, but when the Control Room must be abandoned, both units will be transferred to remote shutdown panels. Therefore, these annunciators will not be moved to 2H11-P603, but will be regrouped on 1H11-P603.
The following annuncircrs do not belong on 1H11-P603 and should be moved to 1H11-P602:
SUPPRESSION CHAMBER LEVEL HIGH (RCIC)
COND STORAGE TANK LOW LEVEL (RCIC)
HPCI ISOLATION VLV F002/F003 NOT FUUJ GPEN should be moved to 1H11-P601, but no space is available.
Radiation monitoring annunciators for Reactor Building and Rt! combiner Building are on 1H11-P603 and act on 2H11-P603.
These are specific for Unit 1 and, therefore, will remain.
RCIC ISOLATION VLV F007/F008 NOT FULLY.0?EN should be moved to 1H11-P602.
Thnn changes should make the annunciator panels essentially the nme with annunciators grouped similvh/ on both units.
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RFCJMMENMTION: RegroVp i. annunciators as shown.
IMPLEMENTATION: Dccember 31, 1989 s
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' VESSEL STANDBY LIQUID RPT SYS "B" RPT SYS ~B" HIGH RAD LEVEL (VEL TANK TEMP TRIP OUT OF SVC OR DRWL FLR DRN
! LOW HIGH/ LOW LOSS OF CONT PVR PMP COOlA & B TRP 1
1 STANDSY LIQUID SELC LOSS OF VESSEL FLANGE HIGH RAD LEVEL PUMP SUCTION CONTINUITY SEAL LEAK DRVL EQJIP DRN l LINE TEMP LOW TO SOUIB VALVE PMP COO 9A & B TRP l
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.INE MAIN STEAM LINE ROD SECUENCE t" LOW PRESS *B" CONTROL SYSTEM MALFUNCTION i
- R LOW CONCENSER TORUS OR DRYWELL ALL "A"/"B" l iS VACUUM BYPASS 150L VALVE SEQUENCE RODS LEVEL *B" AUTO CLOSURE NOT FULL OUT BYPAS5
! TODUS Vacuum TIF SHEAR VALVE "A" RODS "B" RCOS RELIEF VALVE CLOSED OR BYFASSED BYPASSE3 )
F911 C"EN CIRCUIT OPEN ]
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l HED: 745 I
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PROBLEM: Several annunciators have multiple inputs.
ANALYSIS: CR0 ACC L0 PRESS OR HI LEVEL
]
According to procedure 34AR-603-148 and design document H-17795, a switch is provided to determine which alarm is initiated.
SCRAM VALVE PILOT AIR HDR HI/LO PRESS I REACTOR VESSEL WATER LEVEL HI OR LO SLC TANK LEVEL HI/LO '
SLC TANK TEMP HI/LO These alarms can only have one input at a time and indicators )
are available for the operator to determine which condition '
exists.
All of the TRIP OR INOP annunciators result in the same effect 1.nd are, therefore, not multiple inputs.
RECOMMENDATION: Alarm s !paration is not required.
54 O
- -- -. - - - - - . ---m----,---- ..w----,a----,__-_ a
PANEL: lHil-P609 and 2Hil-P609 HED: 1 PROBLEM: Nine key switches are above the maximum height of 60 inches.
ANALYSIS: On each of the two panels indicated, there are 9 key switches located approximately 90 inches above the floor (30 inches over max height of 60 inches):
MSIV LOGIC (two switches per panel)
MSOV LOGIC (two switches per panel)
RWCS LOGIC (two switches per panel)
Condenser Low Vacuum (two switches per panel)
RPT Sys. A Out of Service (one switch per panel)
A review of the existing panel arrangement for these panels did not reveal a satisfactory alternate location on existing panels for these switches. Also, due to the purpose of these switches, movement to another panel would not be practical.
A review of existing plant procedures revealed no significant reference to these switches in regard to being readily available for access during an emergency situation. The six switches pertaining to logic (MSIV, MSOV and RWCS) are set-up for normal / test mode of a power failure of any of the relays pertaining to that system. The two low condenser vacuum switches allow operators to eliminate alarm noise distraction after this condition has been identified. The remaining switches disconnect power to the panel.
RECOMMENDATION: It is recommended the switches be left at current locations.
Little value would be received from moving them since they are mainly used for a test or bypass mode.
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PANEL: 1H11-P609 and 2H11-P609, HED: 39 PROBLEM: The panels do not have the same layout between Units 1 and 2.
ANALYSIS: Overall the two panels for both units are symmetrical ~ ,
revealing little or no geometrical deviation of components.
The major differences are as follows:
- 1. Nomenclature for the Unit 2 engravings is less specific when compared to the Unit 1 panel.
- 2. Physical position of engraving to component varies between the two units.
- 3. The four indicator lights (two for'CB4TC status and two for System B Turbine Control Yalves) are mirror-imaged l between the two units.
RECOMMENDATION: Rearrange the four indicating lighO for 1H11-P609 in a mirrored order.
IMPLEMENTATION: December-31, 1989 56 0
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'8803050584-% em_
PANEL: 1H11-P611 and 2H11-P611 HED: 1 O
V PROBLEM: Nine key switches are above the maximum height of 60 inches.
ANALYSIS: On each of the two panels indicated, there are 9 key switches located approximately 90 inches above the floor (30 inches over max height of 60 inches):
MSIV LOGIC (two switches per panel)
M50V LOGIC (two switches per panel)
RWCS LOGIC (two. switches per panel)
Condenser' Low Vacuum (two switches per panel)
RPT Sys. B Out of Service (one switch per panel)
A review of the existing panel arrangement for these panels did not reveal a satisfactory alternate location on existing panels for these switches. Also, due to the purpose of these switches, movement to another panel would not be practical.
A review of existing plant procedures revealed no significant reference to these switches in regard to being readily available for access during an emergency situation. The six switches pertaining to logic (MSIV, MSOV and RWCS) are set-up for normal / test mode of a power failure of any of the relays pertaining to that system. The two low condenser vacuum switches allow operators to eliminate alarm noise distraction after this condition has been identified. The remaining switches disconnect power to the panel.
RECOMMENDATION: It is recommended the switches be left at current locations.
Little value would be received from moving them since they are mainly used for a test or bypass mode.
59 1
l i
PANEL: 1H11-P611 and 2Hil-P611 HED: 39 PROBLEM: The panels do not have the same layout between Units 1 and 2.
ANALYSIS: Overall the two panels for both units are symmetrical, revealing little or no geometrical deviation of components.
The major differences are as follows:
- 1. Nomenclature for the Unit 2 engravings is less specific when compared to the Unit 1 panel.
- 2. Physical position of engraving to component varies between the two units.
- 3. The four indicator lights (two for CB4TC status and two for System B Turbine Control Valves) are mirror-imaged between the two units.
RECOMMENDATION: Rearrange the four indicating lights for 2H11-P611 in a mirrored order.
IMPLEMENTATION: December 31, 1989
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'8801060584 31 62
PANEL: 1H11-P614 and 2H11-P614 HED: 39, 78 PROBLEM: Unit 1 and Unit 2 panels do not have the samo layout, and component groups are not arranged in functional or sequential relationships.
ANALYSIS: Except for some differences in labels, minor location I
differences, and differences in brands of instruments, the Unit 1 and Unit 2 panel are basically the same. No major problems have been identified.
(1 & 2) H11-P614 is the nuclear steam temperature recorder panel. Temperatures are monitored at a variety of locations i on numerous systems including Nuclear Boiler, Reactor Recirculation, RHR, HPCI, RCIC, and RWCU. The lights and indicators are divided into Division I and Division II with similar arrangements for each division, thereby making it look like functional or sequential arrangements do not exist. However, separating controls by division is an acceptable convention and enhances. operation of the various systems.
RECOMMENDATION: No modifications are required for these HED's.
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PANEL: 2H11-P614 HED: 234, 619 s ,~. ( ,) PROBLEM: Printed values on recorders 2B21-R606, 2B21-R614, 2B31-R601 2831-R625, 2B31-R626 and 2E41-R605 are dif ficult to read, display is not clear, and the operator cannot read the channel being plotted. ANALYSIS: These recorders have been replaced with L & N Speedomax recorders since these HED's were written. Therefore, taese problems have been resolved. RECOMMENDATIONS: No modifications are required, i. 1 s, ,
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. NCBLEM: t The panels do not have the same layout between Units 1 & 2.
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', AMAL E R The host noticeable differenca between 1H11-P645 and
'l' t. 2H11-M45 i) that the physMi 1syout of the recorders is
[' 's 'different. Each panel has eleven recorders. Some contain
, the same paraawters while others are specific to the unit.
,I In addition, those recorders with the same parameters are located in different positions between the two units. In order to make the panel layouts more similar, several recorders should be relocated. ,
' RECOMMENDATION: Rearrange recorder positions on JH11-P645 as shown, s,
' IMPLEMENTATION: December 31, 1990
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PANEL: 1H11-P645 and 2H11-P645 HED: 228, 620 PROBLEM The failure mode of indicators is not evident, and the channel plotted is not legible for recorders 1011-R619, 1011-R625,1011-R630, and 2021-R6008. ANALYSIS: The General Electric 2-pen strip chart recorders are used extensively throughout the control room. A " live zero" function of the recorder should cause a failed channel to peg either upscale or downscale. Replacing all of the recorders to implement a different type of failure indication would not be practical. The recarie.rs indicated to have printcut problems are most likely the result of instrumentation problems sending signals to the recorders. Electrical noise, interference, or erratic signals from the sending units could all contribute to the broad output on the chart paper. Signal conditioning could be incorporated but would have to be done on a case by case basis. In all likelihood, the recorder is not at fault. Investigations should first be made in the process instrumentation. RECOMMENDATION: Do not replace the recorders. Instead, the Plant Hatch I & C Department should investigate the problems with an emphasis on the input signal. O 70 q U l . _ - - - - - _ _ - - - - _ - . _ _ - - -
1 PANEL: 1H11-P650 and 2H11-P650 HED: 42, 78, 435 i PROBLEM: Unit 1 and Unit 2 have different layouts, component groups are not arranged in functional or sequential relationships, and there is no logical arrangement to systems. ANALYSIS: This panel contains the main turbine and reactor feed pump controls. It is basically a non-safety related panel. However, the problems identified present thh panel as I confusing and difficult to operate. Some regrouping is in order and justified. RECOMMENDATION: Move lE11-R900 and 1E11-R901, RHRSW Pressure Indicators, f rom { lH11-P650 to 1H11-P601 as indicated in the 1H11-P601 analysis. Move Isolation Valve Feedwater to Drywell switches from 1H11-P650 to 1H11-P603 as indicated in the 1H11-P603 analysis. Move IN62-R690, Off-Gas Filter Indicator, Stack Dilution Fan 1A-1N62-CS25A, Stack Dilution Fan 1B, 1N62-C5258, Off-Gas Stack Inlet 1N62-F527, HEPA Outlet Valve Off-Gas Filter "A", 1N62-F526A, HEPA Outlet Valve Off-Gas Filter "B", 1N62-F526B, HEPA Inlet Valve Off-Gas Filter "A", 1N62-F525A, and HEPA ; Inlet Valve Off-Gas Filter "B", 1N62-F525B, controls from 1H11-P650 panel to 1N62-P600.as indicated in the 1N62-P600
- analysis. /7 .
Rearrange controls on 1H11-P650 as shown for improved
'V grouping.
l Move 2 Ell-R650A and 2E11-R6508, RHRSW Pressure Indicators, from 2Hil-P650 to 2H11-P601 as indicated in the 2H11-P601 analysis. Move 2P41-R601B, Service Water Pressure-Plant, to location vacated by 2E11-R6508. I Move 2N62-F057, Off-Gas Stack Isolation, from 2H11-P650 to 2N62-P600 as indicated in the 2N62-P600 analysis. Rearrange controls on 2Hil-P650 as shown for improved grouping. IMPLEMENTATION: December 31, 1990 71 O
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PANEL: lH11-P650 and 2H11-P650 HED: 442, 475, 752 lh PROBLEM: RHRSW pressure indication is on (l&2) Hil-P650 while the controls and other related system indications are on (l&2) H11-P601. ANALYSIS: The RHRSW pressure indicators on panel H11-P650 of both units requires dual operator response in order to operate the RHRSW. Metered control by one operator is not possible with the present design. Moving the indicators to H11-P601 will allow the use of one operator and will reduce the chance for error. RECOMMENDATION: The Unit 1 pressure indicators 1E11-R900 and 1 Ell-R901, and Unit 2 2E11-R650 A, B, found presently on panel H11-P650 of the respective units should be moved to the respective Unit 2 panel H11-P601. For location refer to Hil-P601 analysis. IMPLEMENTATION: December 31, 1990 74 l l 1 O
PANEL: 1H11-P650 and 2H11-P650 HED: 468, 476 ! O V PROBLEM: Plant Service Water (PSW) pump discharge pressure is dependant on river level, and PSW flow indication is needed in the Main Control Room. 1 ANALYSIS: The PSW system is designed to supply cooling water to i equipment required for accident and non-accident conditions. ) The PSW consists of four, one-third capacity pumps located in the river water intake structure. The pumps are controlled so that if the operating pumps cannot maintain'the required system pressure, the pump that is in r~andby will automatically start. River level at the intake structure is important because of its effect on the operation of the pumps. The PSW pumps at rated conditions require a river level at the intake structure of at least 61.7 feet. This level will provide the q pumps with the sufficient NPSH required to operate. In j addition, river level is used in the pump operability ] calculations. The dif ferential pressure asked for in procedure 34SV-P41-001 requires the actual river level. The pump discharge pressure is read from local pressure indicators and is used with river level to determine the pump's total dynamic head. Flow indicators would not provide ' any useful information for this calculation. Local flow indicators, however,-are available. The Unit 1 flow indicators, P41-N503, P41-N504, P41-N505, and P41-N506, and Unit 2 flow indicators, 2P41-R311 A-D, are used to determine the flow rate required by procedure 34SV-P41-001. : The pump flow is achieved by throttling manual valves located in the intake structure valve pit to the required value indicated by the flow indicators previously mentioned. Flow indicators in the Main Control Room would be of no benefit. One benefit of installing flow indicators in the Main Control ; Room would be to provide the operator with the indication of an inoperable pump. However, the time savings between l arbitrarily observing flow indicators in the control room and - s the existing flow indicators at the intake structure will not j justify the significant expense of adding more indicators.. I RECOMMENDATION: Adding PSW flow indicators in the Main Control Room are not required. 1 75 l f U l 1
i 4 PANEL: 2Hil-P650 HED: 245, 618 rb Point select capability is not available on recorders ! ~) s PROBLEM: 2N32-R600, 2N32-R609, and 2N40-R600. ANALYSIS: These recorders have been replaced with L&N Speedomax 250 recorders since these HED's were written. These HED's have , been resob ed. ] RECOMMENDATION: No action required. I 1 i l l l 1 l I cn LJ a i I 76 x
l PANEL: 2H11-P650 HED: 746 PROBLEM: The height of recorder 2T47-R627 is 79 inches, which exceeds the limit of 68 inches. ANALYSIS: 2T47-R627 primarily monitors torus water temperature, torus air temp., and containment temperatures. The recorder is an L&N Speedomax recorder with point select capability. From an operations standpoint, the recorder can be read when standing at the panel. There is no room available on 2H11-P650 to relocate the recorder. Due to space limitations on the panel, there doesn't appear to be another recorder of similar size that could swap locations with 2T47-R627. There would not be a sufficient benefit in moving the recorder versus the cost for its relocation. Therefore, it-is recommended to leave the recorder in its present location. RECOMMENDATION: Leave the recorder as is, i O 77 I O
PANEL: 1H11-P650 and 2H11-P650 HED: 296, 300, 472 PROBLEM: HEATER TROUBLE ALARM and SW TO CWP FLUME DELTA T HIGH should be removed from the RFP annunciator box, annunciators are not grouped above related controls, and the annunciators are not functionally grouped. ANALYSIS: The H11-P650 panels contain three annunciator boxes: turbine, BOP (Balance of Plant), and RFP (Reactor Feed Pump). The windows have been analyzed for grouping and several modifications are in order. At present, there is no heater trouble alarm on either Unit 1 or 2 RFPT annunciator board. There is a feedwater heater annunciator board on Unit 1 (1H11-P650), and on Unit 2 the alarm is located on panel 2Hil-P650 turbine annunciator board. The SW TO CWP FLUME DELTA T HIGH alarm is more of a BOP trouble indicator. The temperature of the water must be-monitored because of Environmental Technical Specification guidelines. The FEEDWATER HEATER ANNUNCIATOR board on 1H11-P650 does not have a corresponding board on 2H11-P650. The corresponding alarms are found on 2H11-P656. The bottom two rows of annunciations on the feedwater heater annunciator board rm should be on another board or panel, No justifiable location () can be found. Therefore, since the windows are available no benefit would be derived by making a change. It is recommended that the feedwater heater annunciator board on 1Hll-P650 remain as designed and that no annunciator board be added to the 2H11-P650 panel. The B0P Misc. Annunciator board has been analyzed and the overall functional grouping has been reorganized as well as can be witr the understanding that the alarms on this panel are miscellaneous in nature. The RFP annunciator boards have been completely reorganized to provide better functional grouping and consistency between Units 1 and 2. RECOMMENDATION: Regroup the annunciators as shown. IMPLEMENTATION: December 31, 1989 78
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MOIST SEP MOIST SEP AB MAIN STOP VALVES LOSS STATOR 5 HAFT VIB EHC ABNORP AB DRN TANK DRN TK LOW I & 4 CLOSED COOLANT TRIP EXPAN ECC ALARM HIGH w m = w . MOIST SEP MOIST SEP CD MAIN STOP VALVE 5 STAND 8Y EXHAUST TUR9 OVERSPEED HYD FLUID CD DRN TANK DRN TK LOV 2 & 9 CLOSED FAN FANNING TRIP HIGH-LOW f HIGH FILTER DIFF ALARP
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n _ .. - - - = . = . = = = . = = - ~ ~ . . - -- - RFPT 18 BRG OIL CWF FLUME 3 TEMP HIGH LEVEL LOW M M RFPT IB BRG CWF FLUME .BRG OIL PRESS LOW CONDUCTIVITY RIP HIGH w l 'BRG RFPT 18 OIL SW TO CWF $55 LOW PUMPS ALARM PLUME DIFF TEMP HIGH x ) RFPT IB OIL TANK RHR5W BRG TEMP !EAO LEVEL HIGH-LOW HIGH
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) THRUST RFPT IB EMERG CHLORINE IP DC OIL PUMP SYS ALARM RUNNING M l EXCESSIVE DIV I RHR DIV II RHR ON STRAINER ALARM j STRAINER ALARM j (SEE NOTE BELOW) (SEE NOTE BELOW) ! PELOCATED IAVAILABLE. i IHil-P650 REACTOR FEED PUMP ANNUNCIATOR I BI j 8801050584- %\ .-
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= w m 1 MSR HOTVELL FEEDVATER INTERCEPT VALVES BELLOVS AND DRAIN TK TURB METAL HYD FLU-HEATER 9 & 4 CLOSED FAILUPE TROUBLE TEMP HIGH HIGH-HI TROUBLE f " t m m m )
s MOIST SEP MOIST SEP INTERMEDIATE TURS VACUUM DIFF TEMP TURS EXHAUST TURSINE HIGH LEVEL STOP VALVES LOV HOOD TEMP HIGH I & 2 CLOSED PRESS Tn HIGH m m m a MAX CCMOINCD COND ROOM INTCCMCDIATC TUCO Vt.CU'!M FLOV LIMIT FLOCO!hG tun 3 CXilAUST STAf0DY ! STOP VALVES LCV TRIP HOOD TEM? TRIP PUM? RUN LIMITTING 9 & 4 CLOSED 1
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l l l 2wII-9650 _ TUP 91NE ANNUNCIA700 B2 880105094- % _
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i ( CONDENSATE MAIN TURB LOOSE PARTS DA ST0AAGE TANK LUEE DIL MONITC:!NG SYS RE HIGH LE.'EL CO.'CTM5 TRDUBLP TROUS.E H! CONDFNCAfF MATN CONDFNTFR CSNDFNEATF PtIFP PAS TAANSFER HOTwELL - low LEvEu TAIP $rg PUMP C001A LOW LEVEL LOW PRE 55 CONOENSATE MAIN CONDENSER 2%9-R601A/B IN PA TPANSFER HIG- LEVEL HIGm 5:EED MODE SYd PUMP C001B l LOW PRESS MAIN STM 37.D STG MAIN STM 3RD DRYWELL/ TORUS SE SJAE A HIGH FLOW STG SJAE A HIGH PRESSURE AU1 LOW FLOW SIG MAIN STM 3RD STG SJAE AUA DRAIN FUEL POOL F/D SE' f SJAE B HIGH FLOW TANK A HIGH LFVEL SYS TROVELE Cod
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V o MA:N STM i:0 STG 5.JAE AUX D 3 !N RCWA5TE PLOG SEL SJAE B LOW FLOW TAN < B HIGH LEVEL VE'4T Sr5 TA;UELE C0f LO.
- RELOCATED T1 APERTURE CARD 14 Aleo Available On Aperture Card q I
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l l W' ELL / TORUS CV: MOV SUMP SERVICE VATER CONTROL E.DG O!L CCNTROL CIL CONTROL I,OER R627 FIGH LEVEL P5W PUMP 2A VB SJMFS SUMFS HI2, LEVEL BLOG SJMP E 0G SUMP ' OVERLOAD /LCCK OUT
- TEMP F;2H LEVEL C001 CCO3 RELAY TRIF:ED 71 phi t -F A% <ral n Ti VAc enNS PvcTFR RAnW PT1tTirN HYD.CSEN HYORC3EN pqw p mp 73 TE1 TROVELE FLN TANA FUh.L5 5UCTION VLv E;x SUMF FECDMBINER FECOME!NER OVE;LCAD/LC WOUT CVE:5 LOW LCw F:iE55 HIGH LEVE. FOR EKR TRIP Sv51EM TROUBLE F.ELAY TRIF:ED
= (FF,CM N62-FsC;1 EL 2 Hit-F657 F.:NEL 2dil-P700 CIL IN TU,BINE TE9 TROUELE 55 TEM TROUSLE F5s INTA<E F54 PUMP 2C ELOG FLOOR 5 FUCTU E LOW OVEA' 0AD/LC:<0VT DRAIN SJMP WATER LEVE. FELAY TRIerg)
SYSTEM SIC SYSTEM 0 INITIATION P5W DISCH TO FICCW PUwFS DISCH P5W FLNP 23 COOLER SA OR *,3 NAL FRESENT LCW FLOW CCW INLET LOW LOW PFESS OVER 0A0/ LOC < CUT DirF PRESS RELAY TRIFFED SYSTEM SEC SYSTEM FB VENT EFFLUENT LER IA OR IB RECCV Sv5 F5CCW SYS CWP FLL*'.E COOLER 2A OR 29 ANY COLLECTOR SURGE TANK ! FEAT EXCH FLOW LCw F.0W RAD LEVEL MAX LOW LEVEL LOW LEVEL HIGH OUTLET TEMP Sv5~E* SE: 5'5'EM :E VE'S E:FAENT 5 :5 . J.E: E4 .ER se OR 78 C:0LE: LA OP kE A.; CL: LECTOR FE:Cs 5'5 :E004 555 MEAT Ci F.L*E FLOW 2: .-50:5 T R C.JE.E 5.:2E TA';K I ErC~ LOW k!!H LEvE. LOW F.0W AAD LE/E. max E;3H LE/EL C.'T.ET TEMP 2- 11 -rit ; BOP MISC ANNUNCIA OR E3 8801os0584 '"3
RFPT 2A RFPT 2A BRG. RFPT 2A E {' TRIPPED DIL TEMP HIGH 2B EMERG j ' OIL PUMP 5 COO 9/ COIO OVERLOAD l w w , RFP1 2A THRUST RFPT 2A HYD RFPT 2A OR 28 EEARING VEAR OIL PRESS LOV H2O SEAL l TRIP HIGH TEMP J w w w RFPT/RFP 2A RFPT 2A OIL RFPT 2A BEARING BRG OIL PUMPS COO 7A/B TEMP HIGH PRESS LOV OVERLOAD w w w l RFPT 2A RFPT 2A OIL RFPT 28 BEARING SPEED ZERO TANK LEVEL TEMP HIGH LOV' w w w g k' RFPT 2A RFPT 2A EMERG THRUST VEAR DC OIL PUMP TRIP LOCK 0UT RUNNING w w R PT 2A STEAM OR VATER REACTOR FEED EXCESSIVE ANALYSIS ALARM PUMP LOOP. VIBRATION SEAL LOST
- RELOCATED TI APEllTURE C/g}[]) NOTE: THESE VIND0V5 TO 2Hil-P609 BUT NC Aho Available On Aperture Card
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r *' . I RFPT 29 RFFT 22 BRG RFPT OIL TRIPPED OIL TEMP HIGH CONDITIONER TROUBLE I w w w RFPT 29 THRUST RFPT 29 HYD CWP FLUME BEARING WEAR TRIP OIL PRESS LOW CONDUCTIVITY HIGH w w w i RFPT/RFP 29 RFPT 23 OIL SW TO CWP BRG OIL PUMP 5 COOBA/B FLUME DIFF PRESS LOW OVERLOAD TEMP HIGH w w RFPT 2B RFPT 25 OIL RHR5W BRG SPEED ZERO TANK LEVEL LOW TEMP HIGH
- w(SEE NOTE BELOW)
RFPT 28 THRUST RFPT 22 EMERG CHLORINE WEAR TRIP DC OIL PUMP SYSTEM LOCKOUT RUNNING w RFPT 23 DIV I RHR DIV II RHR EXCESSIVE STRAINER STRAINER VIERATION y (SEE NOTE EELOW) (SEE NOTE EELOW) 40ULD EE RELOCATED PACE IS AVAILABLE. , 2Hil-P650 , f' PEACTOR FEED PUMP ANNUNCIATOR 84 98010bD5"4~94 _ _
i 3 ;. 'b' PANEL: iHit-P650 and 2H11-P650 HEW 319 PROBLEM Several alarms have multiple inputs. g s .. ANALYSISi
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HYDRAULIC FLUID t.EVEL HI/LO TURBINE OIL TANK' LEVEL HI/LO RFP TURBINE OIL TANK LEVEL HI/LO
'Y, These alanns have indications that cannot happen pj simultaneously, i.e. the condition can't be both high and 43 F
Ts low. Therefore, alarm separation is not required.
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DEMIN HOUSE LO AIR / WATER PRESS LOW / DEMIN STG TANK LEVEL These inputs will be separated and relocated to the BOP 3 . anunc',ator tox. Unused " Aux Boi k. " tiles will be deleted
'I, to provide the required space.
t j , NTAKE SCREEN OR LOW WATER LEVEL P All actions required for this alarm cover both conditions.
' Physical verification at the intake structure is required.
Therefore, alarm separation is not required. v, ' T.G.O.P. or E.B.O.P. OVERLOAD p < l hta of. these pur.nps should not be running simultaneously. In l addidon, both pumps have indication lights 'on the, panel to ~ ! show operational status. Therefore, alarm separation is not-required. j ' L uiYO FLUID TEMP HI/LO OR FILTER DIFF ALARM This alarm requires that investigations must be performed at the hydraulic units. Temperature gages must be checked to determine'if the problem is temperature related. Otherwise, the protlem is due to high differential pressure. Separation of these input: would not prevent th( same resulting actions. I CONDCIRCWTRDPHIORHOTWEd.LOWLEVEL Recorders anh 4dicators?cn H11-P650 provide the necessary differential hn of problems. These inputs are not safety-relatedland do not require sepMation. l STANDBY rP 0 OR B0OSTER PUMP RUNNING 5eparation of these inputs is not required since the reason. for indication is that a standby pump is running. Pump indication on the panel will provide information as to the , status of the standby pumps. ) 85 u 4
. 1 L______n__________________. .. -____ _ _- ___. . _ - _ _ _ -_
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Continued . . . PANEL: lH11-P650 and 2H11-P630 l , 6
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i HED: 319 ANALYSIS: MSR HOTWELL AND DRAIN TANK TROUBLE ' (con't) t Inputs resulting in this alarm must be checked on 2H11-P656. M' ' , There are too many associated alarms to attempt a relocation to the front panel. It if recommended not to separate this t
/ Window.
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( TURBGEN/CONDORCiPCWATER_Pt/APBRGTEKjHIGH
% l-This alarm requires a check of temperatyn vindication on H11-P655 to determine wdien bearings have high temperature. J Separating these inputs would still result in the same '
/ actions dn H11-P655. s Therefore, alarm separation is rat required.
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STEAM OR WATER .4ALYSIS - This alarm is non-safety related. Inputsarefrommultk91e {
) ' j sampling stations. Separation is not recommended.
x I s RFPT 1A & 1B BRG TEMP HIGH s RFPT A or B WATER SEAL TEMP HIGH \ RFPT 1 A & 18 EMERG DC OIL PUMP OVERLOAD ' 4fPT 1 A or 18 SEAL WATER FLOW RATE LOW
'The critical RFP alarms are separated Anto "A" and "B" alarms. To prevent an excessive number of windows, these j s -
less criticWalar'M are combined. Instrumentation is
'- readily.avillts!e to distinguish between alarm conditioni for j "
' the " M and "B" r. umps. . Separation of these alarms would
) ; presentza signWicantispace problem in the annunciator j
[ boxes. ItisrecommendednottoseparatetheseaJarms. RECOMMENDATION: Separate DEMIN HOUSE L9 AIR / WATER PRESS LOW /DEMIN STG TANK i LEVEL alarm. > IMPLEME;;TATION: December 31, 1909' i i V 4 V j [Af I
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PANEL: 1H11-P651 and 2H11-P651 HED: 39, 78 p (,) PROBLEM: The panels do not have the same layout between Units 1 and 2, and component groups are not arranged in functional or i sequential relationships. ANALYSIS: Both panels have the same layout and design, with only minor differences. These differences include: J
- POWDEX 20BV MCC 1E (R24-5043) controls on the Unit 1 panel not on Unit 2.
- RADWASTE ADDITION 600/208V MCC 1B (R24-S020) controls on ,
the Unit 1 panel not on Unit 2. {
- Two (2) TUP.BINE BLDG MCC'S controls powered off the 600V i Bus 2B.
- R/W SOLID. TRANSFORMER POWER SUPPLY controls powered off 600V Bus 1B. 1
- RX & RW BLDGS. CHILLER A STARTER and CHILLER B STARTER on j the Unit 2 panel not on the Unit 1 panel, j These differences represent differences between Unit 1 and Unit 2 and not necessarily differences between the panels. '
Since these differences are minor and would not benefit from changes, nothing should be done. All of the electrical bus and transformer controls are laid O out graphically with the connections between the various d, components indicated. It is concluded that this panel is laid out as well as it can be and that the arrangement of the various controls and instrumentation is adequate. RECOMMENDATION: No modifications are required. I J 87 l ,o
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PANEL: 1Hil-P651 and 2Hil-P651 HED: 228 PROBLEM: Failure mode of indicators is not evident. ANALYSIS: Indicators on this panel fail below zero or below scale when power is out or a signal loss occurs. This should be 'y apparent to the operator such that instrument replacement is i not required. / I RECOMMENDATION: No action is required. .
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PANEL: 1H11-P651 and 2H11-P651 295, 301, 472 HED: PROBLEM: Annunciators are not grouped within annunciator box by L system, annunciators are not grouped above related controls, and Unit 1 annunciator locations do not match Unit 2. ANALYSIS: Electrical Annunciator Box Many of the annunciator windows are grouped together by system or component, but it appears that new annunciator windows have been added since the panel was put into service. They were probably located as close to their , corresponding alarms as possible at the time they were I installed; however, upon looking at the current configuration, many "same-system" alarms are scattered around the box. Hydrocen & Stator Annunciator Box This annunciator box is grouped fairly well considering the alarms it contains. It could be improved by re-grouping; however, in looking at it f rom a cost / benefit standpoint, the expense would outweigh the small improvement that would be seen. There are several annunciator windows on the Unit 1 panel ,
,,' that are not on the Unit 2 panel and vice versa. There are
/ only two windows that are located on both panels but in
\>) different locations. These are the INVERTER R44-S002 TROUBLE alarm and the MCC 1E-B ALTERNATE FOR BKR TRIPPED alarm.
RECOMMENDATION: Regroup the annunciator windows as shown for Electrical Annunciator Box. No changes are required for the Hydrogen & Stator Annunciator Box. IMPLEMENTATION: December 31, 1989 91 C
1.. 600V BL"5 l A COOV BUS IAA STA SERV SUPPLY STA SERV SVGR 6COV STA SERV ul60V E UNDERVOLTAGE UNDERVOLTAGE tiREAKER TRIPPED DC OFF TRANSFORMERS UNDERVC ALARM
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ON STANDBY ALARM LOSS ALARM BKR TR
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PANEL: 1H11-P651 and 2H11-P651 HED: 31 8 , PROBLEM: Several annunciators have multiple inputs. ANALYSIS: H11-P651 is an electrical panel containing controls for'4160V Buses, 600V Buses, and the associated transformers that step the voltage down, such as 4160/600V and 600/208V transformers. Many of the listed annunciators are emergency O.C. power to certain transformers, i.e. 125/250V, 480/277V,- 120/208V, etc. The remaining annunciators either have the same response. regardless of which problem exists or the alarms are tied in to the electrical circuitry such that it is difficult to separate them. The latter case is only applied when the required response is the same, or if the components are located near each other and' deter:nination of the problem is easily performed there. It should be noted that the four HI/LO alarms could be separated if space existed in the annunciator box. However, these high and low inputs cannot occur simultaneously. Therefore, separation is not required. RECOMMENDATION: Alarm separation is not required. O 94 O
PANEL: 1H11-P652 and 2H11-P652 HED: 39, 78, 204 PROBLEM: The panels do not have the same layout between Units 1 and 2, and component groups are not arranged in functional relationships. i ANALYSIS: For the majority of the instruments and controls, the Diesel panels are arranged functionally and sequentially. In the few instances where they are not, it is due either to space l limitations or divisional separation, such as for plant l service water. The Unit 2B standby service water pump controls are located differently from Unit 18. Since these controls operate the same diesel, this could be a problem and should be relocated. The standby service water isolation valve control switches (2P41-F316 A-D and 1P41-F310 A-D) are in different locations but cannot be moved due to space limitations, Unit 1 Diesels have no KW indicators. There is no room on Unit 1 for these. The Unit i diesel battery voltmeters are located where Unit 2 has KW indicators. There is no room to change this. There is no " Diesel Generator Test" switch on the Unit 2 benchboard.
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The other differences between Unit 1 and 2 panels are i insignificant and cannot be changed due to space limitations, d O On Unit 1 the day tank and main tank fuel level indicators ; are both on the right side of the meters. The indicator on the left is the standby service water pump pressure indicator. RECOMMENDATION: No changes are required for lH11-F652. For 2H11-P652, make the following chacges: Move the fuel level indicators and standby plant service water pressure indication in Unit 2 bay "B" as shown. Move the standby plant service water pump controls in Unit 2 l bay "B" as shown. Move the main tank fuel level indicator over one space to the : right into the unused portion of the panel. Move the day tank fuel level indicator to the former location of the main tank indicator. (con't) , 95 : f k m_____ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ . _ _ . - _ . _ _ _ _ . _ _ . _ _ _ _ _ _ . . _ _ _ _ _ _ _ _
RECOMMENDATION: Move the service water discharge pressure indicator into the (con't) former location of the. day tank lovel indicator. This will place the fuel tank level indicators in the same location as the Unit 1 A, B & C indicators, and the standby service water pressure indicator the same as the Unit 18 indicator. IMPLEMENTATION: December'31, 1990 I U 96 O
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PANEL: 1H1'i-P652 and 2Hil-P652 HED: 197; 259 PROBLEM: Diesel Generator speed and voltage adjust controls and start switches operate in reverse of meters and population stereotype. The meters are correct. ANALYSIS: When adjusting the Diesel speed or voltage, the meter moves in the opposite direction of the control switches because the control switches are reversed. This could cause an operator to inadvertently adjust the diesel speed or voltage in the wrong direction. The start /stop switches have start-on left and stop on the right which could cause an operator to assume he/she had started or stopped the diesel if they.did not look carefully at the labeling. RECOMMENDATION: Reverse the diesel speed and voltage adjust. controls and reverse the start /stop switches in all six Diesel Bays. IMPLEMENTATION: December 31, 1990 99 O e
PANEL: 1H11-P652 and 2H11-P652 HED: 436, t01, 519
/ PROBLEM: Control switches 2P41-F316 A-D are difficult to use due to the amount of time they must be held to open or close.
ANALYSIS: Unit 1 valve controls (1P41-F310 A-0) and Unit 2 valve controls (2P41-F316A-D) can be changed to a seal-in type circuit. There should be no mechanical or instrumentation changes required as the switches are spring return; only a wiring change and relay additions will be required. An override function can alsc, be provided for manual positioning. RECOMMENDATION: Change the circuits for 1P41-F310 A-D and 2P41-F316 A-D controls to seal-in type circuits. IMPLEMENTATION: December 31, 1990 i f)
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l i I PANEL: lHil-P652 and 2H11-P652 { HED: 297, 472 I Annunciators are not functionally grouped or similar between
'C PROBLEM:
Units 1 and 2. ANALYSIS: These annunciators are grouped primarily by function, and are generally arranged so that higher priority alarms are at the top. Reorganization of the windows would not provide any benefit to the operators. The annunciators are arranged the same on both units; therefore, no rearrangement needs to be made to make the units the same. 1 l' All of the windows in this panel are needed and are arranged functionally and sequentially to the best extent possible. All are arranged the same on both units, with an annunciator box for each diesel generator ( A, B & C) on the panel arranged over the corresponding controls for the respective diesel generator. ) RECOMMENDATION: Annunciator regrouping is not required. , l l l I. 1 01 i nl t l 6
PANEL: 1H11-P652 and 2Hil-P652 HED: 317 g PROBLEM: Several alarms have multiple inputs. ANALYSIS: FUEL OIL LEVEL HI/LO OR TANK H2O DETECTOR The level can be easily determined from the level indicator located immediately below the annunciator box. If tha level is not a problem as seen on the level indicators, then the problem is H2O detection. GEN OR STA SERV TRANS DIFF AUX TRIPPED This alarm indicates the' loss of a diesel generator or loss of a 600V bus. The response to this alarm is to check the diesel generator and circuit breaker indicating lights on the panel. These lights are readily available such that alarm separation is not required. LUBE OIL' TEMP HI/LO, JACKET COOLANT TEMP HI/LO, CRANKCASE PRESSURE HI 1 The response to this alarm is to locally check the diesel. Even if this alarm were divided into five separate windows, the response.is still the same. Therefore, separation is not recommended. BATTERY LOW VOLTS OR FUSE TROUBLE This alarm results in the same effect, i.e. the operator must switch to backup battery charger. Separating the alarm would not affect operator response. DIESEL MCC 1B UNDERVOLTAGE OR DEENERGIZED This alarm indicates that 600-208V MCC is deenergized. Separating the alarm would not provide any additional benefit. RECOMMENDATION: Alarm separation is not required. I i i 102 j j O ' I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - . . - __a
PANEL: 1H11-P653 472, 628, 704, 705, 706 HED: 'm The density of annunciators in a "datrix is too crowded, and
) PROBLEM:
annunciators are not grouped by system or above related controls. ANALYSIS: The 1H11-P653 annunciators are made up of three separate boxes. The CAB annunciators are grouped together to advise the control room of breaches in security. A need for specific grouping in this thatrix does not exist. At the time the window alarms, no immediate response in the form of a control activation is required. Therefore, it is reconrnended that the CAB annunciators be disconnected and no longer used in the control room. The 230KV substation annunciators are grouped together as well as above their related controls. Separating informational alarms f rom diagnostic alarms would not be cost beneficial since these alarms deal with electrical distribution and are not safety-related. No changes are recommended for this annunciator box. The NSSS annunciators are used for information and system status. These annunciators are illumined by operation of the toggle switches on the vertical board. However, the positions of the toggle switches are mirror-imaged from the annunciator positions. The toggle switches should be e repositioned such that the bottom left switch illuminates the bottom left window, etc. RECOMMENDATION: Reposition the toggle switches to conform with the window positions. Disconnect CAB annunciator box and remove. IMPLEMENTATION: December 31, 1990 103 ( v
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o PANEL: 1H11-P654 and 2H11-P654 HED: 39, 433 PROBLEM: The panels do not have the same layout between Units 1 and 2, s T48 switches are scattered on the panels, and the offgas stack and HEPA filter isolation valves should be moved to the offgas panel. ANALYSIS: Panels 1H11-P654 and 2H11-P654 controls werecstvfewed for ' similarities and differences. The major difference.hetween , the two units controls is the Control Building Ventilation li? controls. The majority of the Control Building Ventilation, controls are located on the Unit 1 panel. This is not , considered a discrepancy because the Control Building is noti 3' ' physically separated into two units. It is mar O referable . to have these controls remain on one unit's pan'e1. Other differences are minor and not cost effective to change. The T48 switches are actually grouped by subsystem. Tite T4? drywell atmosphere, T48 differential pressure control, and T48 PCIS override switches are grouped separately aue to their dif ferent function. In addition, the T48 PCIS override switches are grouped in a horizontal row similar to those on l H11-P657. Therefore, regrouping these switches would not , provide any additional benefit. The offgas controls in question are probably the Standby Gas Treatment System (SGTS) valves and should be located on H11-P654. The associated annunciators are also located on v this panel. It is recommended these controls not>he moved. RECOMMENDATION: No modifications are required. I f l
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O PROBLEM: Torus water level and drywell pressure should be moved to a front panel. i ANALYSIS: According to the H11-P602 analysis, T48-R607A, narrow range drywell pressure and torus water level, will be moved from H11-P657 to H11-P602. RECOMMENDATION: No action is required for this panel. O 1 1 108 t j _ _ _ _ _ _ _ _ _ . _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ m __ .__m..__ __ _ _=____=.____ m..m_______m_______,__m._.m__ _ _ . _ _. _ _ _ _ _ _ _-__._mm-_.a
PANEL: 1H11-P654 and 2H11-P654 HED: 245, 617 O PROBLEM: Point select capability is not available on recorder T41-R620, and recorders T41-R620, T47-R612, and 2T46-R601B do not clearly display the channel plotted. ANALYSIS: 2T46-R601B is the Standby Gas Treatment discharge flow recorder. Although the recorder could be replaced to improve its display, the existing instrument is adequate when the replacement cost is compared to the benefits received. T41-R620 monitors various temperatures such as fuel pool heat exchangers, MG set rooms, and turbine building ventilation. These parameters are not critical enough to warrant replacing the recorder for the reasons stated in these HED's. However, ' due to maintainability, the recorders should be replaced in the recorder replacement program when practical. T47-R612 monitors parameters such as torus water temperature and torus air temperature. This recorder has been replaced on units 1 and 2 with L & N Speedomax recorders. RECOMMENDATION: No action is required. O l l 109 O V i
PANEL: 1H11-P654 and 2H11-P654 HED: 301, 472, 628 O v PROBLEM: Annunciators are not functionally grouped above their related l controls, and the density of annunciators is too crowded. I ANALYSIS: Panel H11-P654 annunciator panel is the gas treatment and i ventilation panel consisting of several systems' visual alarms. i The systems are as follows: T48-Containment Atmospheric Dilution System i T48-Primary Containment Purge & Inerting System T48-Nitrogen Inerting & Make-up System T48-Drywell Torus Differential Pressure System G41-Fuel Pool Cooling System ' T41-Safeguard Equipment Cooling System U41-Turbine Bldg. Ventilation System T46-Standby Gas Treatment System. P64-R.B. Chilled Water System ] Z41-Control Bldg. Ventilation System j T47-Drywell Cooling System 1 The relationship of each annunciator to its respective controls for this panel is considered adequate and within the ! guidelines except for the following: R.B. INSIDE & OUTSIDE HI DIFF. PRESS. When this alarm is received, procedure 34AR-654-001 requires the operator to monitor the actual differential pressure on T46-DPR-R604. This recorder is located on panel H11-P700. This procedure also requires the operator to check the alignment of the dampers / valves in the ventilation system. ; These controls are located on panel H11-P654. To reduce the time of response to this alarm, a differential pressure ; indicator / recorder could be added to panel H11-P654, but the benefits would not outweigh the cost. HPCI ISOL TIMER INITIATED This annunciator will be moved to 1H11-P601. RCIC ISOL TIMER INITIATED This annunciator will be moved to 1H11-P602. 110 0 ; i
1 D.W. & TORUS N2 INERTING SYSTEM INLET HI PRESS Annunciation requires the observation of valves T48-F103, T48-F307, and T48-F309 if inerting is in progress. These valve indications are located on panels H11-P601 & P602. This is not. considered critical because this annunciation is usually initiated when the N2 inerting system is in operation; therefore, the recommendation is to leave as is. The annunciators for these systems / subsystems are randomly displayed on the annunciator panel. They would be better arranged if they were grouped according to system. Due to the physical size constraints, nothing can be feasibly done to reduce the density of the annunciator matrix. Surface enhancements could be used to subdivide the matrix visually with more success than replacing the annunciator boxes. RECOMMENDATION: Move HPCI ISOL TIMER INITIATED f rom lHil-P654 to 1H11-P601 Move RCIC ISOL TIMER INITIATED f rom 1H11-P654 to 1H11-P602 Regroup the , annunciators as shown. IMPLEMENTATION: December 31, 1989 O 111 O g
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PANEL: 2H11-P654 HED: 319, 745 PROBLEM: Several alarms have multiple inputs. ANALYSIS: DW COOLING UNIT A/B LOW FLOW Procedure 34AR-654-041-2 directs the operator to determine which cooling unit is defective by using the controls and indicating lights on 2H11-P654. Alarm separation is not necessary. TORUS WATER LEVEL HIGH/ LOW Only one input can be received at a time. A recorder is available on 2H11-P654 to determine whether the level is high or low. Therefore, alarm separation is not required. STDBY LIQUID TANK LEVEL HI/ LOW This annunciator is not located on 2H11 P654. RECOMMENDATION: Alarm separation is not required. O 114 0
PANEL: 1H11-P655 and- 2H11-P655 ( HED: 39 PROBLEM: The panels do.not have the same layout between Units
- md 2.
ANALYSIS: The Unit 2 panel, 2H11-P655, contains the following equipment: RFPT Stop Valve Wall Temperature Elements (2N32-R652A & B), Main Generator & Alternator Temperature System-Temperature Monitor ~(2N40-N601), Main Generator.'& Alternator Temperature System Power Supply-(2N40-K601),'and Main Generator Loss of Excitation'(2S32-R024). There is no-equipment exactly corresponding to this equipment on Unit 1. Because there is no corresponding equipment on Unit l' and because this panel primarily contains similar information,. the location of this equipment on 2H11-P655.is acceptable and no action is required. The Edison Omniguards are of similar design and arrangement. Unit 2 contains more Omniguards than Unit 1 due to latter design and construction of the plant which created a need for additional monitoring.: In addition, some of the Omniguards: on Unit 1 have been removed and their input replaced by recorder 1N34-R0752 (DCR 82-175). However, this inconsistency should have'no impact on safety. Therefore, no. action is required. The Reactor Feed Pump Trip High Temperature Alarm System.on O Unit 1 is of a different design as Unit:2. However, both units are in the'same position and perform the same function in the sa a manner. 'Therefore, no action is required. The 1H11-P655 24/48P'and 24/48N battery ammeters have scales which are mirror imaged from 2H11-P655. The-lack of proper labeling adds to the confusion. To: reduce' confusion between the two units, the labels should be replaced. The low frequency of use does not warrant' replacing the instruments. RECOMMENDATION: No action is required (surface enhancements). 115 O
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PANEL: 1H11-P655 and 2H11-P655 HED: 193 O PROBLEM: All circular meters and the Bearing High Temp meters have pointers which obscur6 numerals. ANALYSIS: It is recommended that new face plate overlays be made that reverse the position of the numerals and the incremental markings such that the numerals fall just beyond the tip of the pointers. Overlays could be adhesive backed to apply directly over existing face plate without removing pointers. RECOMMENDATION: Modify the face plates rather than the pointers with surface , I enhancement techniques. I O 118 u' l I
PANEL: 1H11-P655 and 2H11-P655 HED: 299, 472 O PROBLEM: Both Unit 1 and 2 Fire Protection Annunciators are located on panel 1H11-P655. ANALYSIS: The placement of both unit's annunciators in one location allows for quick determination of the extent of a fire. In case of fire it is advantageous to be able to identify all areas involved without regard to unit. For this reason, it is recomended that all fire protection annunciators remain in close proximity on the same panel. RECOMMENDATION: It is recomended that no action be taken. s O 119 O
PANEL: 1H11-P656 and 2H11-P656 HED: 39, 300 () PROBLEM: The panels do not have the same layout between Units 1 and 2. ANALYSIS: Panels 1H11-P656 and 2H11-P656 have essentially the same layout. The major discrepancy is that the Unit 1 panel has the startup/ aux 111ary boiler monitoring which there is only one. Unit 2 has 2P61-PI-R600, T/B Auxiliary Steam Pressure, which is on this side only due to the boiler being on Unit 1 side. 2H11-P656 also contains several other indicators which are not on 1H11-P656. However, this is due to different design features of the two units and does not present a problem. 2H11-P656 also has a miscellaneous annunciator box which is not found on 1H11-P656. These annunciators are for balance of plant systems such as feedwater heaters, condensate pumps, and cooling towers. Many of these corresponding Unit 1 annunciators are located on 1H11-P650. Several of the controls for these annunciators are located on panels which do not have an annunciator box. Since these annunciators involve non safety-related systems, their present location on i 2H11-P656 is acceptable. RECOMMENDATION: No modifications are required. I
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PANEL: 2H11-P656 HED: 618 PROBLEM: 2N32-R606 does not clearly display the channel being plotted. ANALYSIS: 2N32-R606 is the main turbine miscellaneous temperature recorder. This recorder is being replaced by DCR 84-187. RECOMMENDATION: No further action is required. l 0 - 4 123 0 a
PANEL: 1H11-P657 and 2H11-P657 HED: 489 O PROBLEM: Drywell pressure and torus water level indications are needed on a front panel. ANALYSIS: Drywell pressure and torus water level (narrow range) currently exist on recorder T48-R607A. This recorder should be relocated to H11-P602 as indicated in the H11-P602 analysis. RECOMMENDATION: Move 1T48-R607A f rom 1H11-P657 to 1H11-P602. Move 2T48-R607A f rom 2H11-P657 to 2H11-P602. IMPLEMENTATION: December 31, 1990 O I 124 9
PANEL: 1H11-P657 and 2H11-P657 HED: 39, 78, 433 ) I (U PROBLEM: The panels do not have the same layout between Units l'and 2, component groups are not arranged in functional relationships, and T48 switches are scattered on the pantL 1
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ANALYSIS: Panels 1H11-P657 and 2H11-P657 wre reviewed for similarities i and differences between the units, as well as component j grouping. Several concerns are evaluated below. It appears that the T41 control switches are randomly spread ; throughout the panel. However, this is not the case. The T41 system is divided into three (3) different groups on the vertical board. These are; (1) Safeguard Equipment Cooling in Bay "C" (2) Refueling Floor Ventilation in Bay *B" and (3) s i Reactor Building Zone Ventilation in Bay "A". Recorder 1T48-R622A, positioned low on the vertical board, is presently grouped with the control switches. This instrument should be grouped with the other drywell and torus hvel monitors. Another location would make this instrument easier to read. This instrument should be moved. Once instrument " 1T48-R607A is moved to 1H11-P002, an open space will be lef t i l on lH11-P657. As such, 1T48-R622A could be moved to the present location of 1T48-R607A. The Fan Reset for 2T46-0001A should be grouped with the other hV Standby Gas Treatment Switches. This instrument is present1') located between P41 and 241 switches and below a T48 switch in Bay "C". The Unit 2 LOCA override switches should be moved laterally one Bay so that they are located in Bays "B" and "A". The corresponding T48 switches for Unit 1 are located in Bays "Bd , and "A". This recommendation would group the T48 switches in ' the same panel location for both units. The reset Fan 1 and Fan 2 switches for 2T41-8017 should be ~ grouped with the Reactor Zone Ventilation switches in Bay l i
"A". These switches are preser.tly located below the
! refueling floor ventilation control switches in Bay "B". These switches should be moved to the three (3) open spaces to the left of the 2T41-C007A switch in Bay "A". Instrument 2T48-R601A is in Bay "B". The corresponding instrument for Unit 1 is in Bay "A". This discrepancy alone is not too great a concern because the two intruments are in close proximity to each other on the Unit 1 and 2 panel layouts. However, this recorder, at 6'-11", is higher than the recommended maximum height off the control room floor. 2T48-R601 A should be moved to Bay "A" to the right of
,, 2T41-R618. The control switch for this recorder should be moved to Bay "A" above 2T47-B007A control switch.
(G) 125
i 1H11-P657 and 2H11-P657 (ccntinued) Indication lights for 2T46-F076 should be grouped with the
,- w Standby Gas Treatment switchessin Bay "A". These lights are
; $ presently grouped with the Prioary Containment Purge and Inerting switches in Bay "B". The16ndication lights should be moved to tne right of switch, 2T4t-f 003 A.
Instrument 2T46-R601A has the same discrepancies as i 2T48-R601A. The corresponding Unit 1 T46 flow recorder is in i close proximity to the Unit 2 T48 flow recorder. However, I the Unit 2 recorder, at 6'-11", is higher' than the ! recommended maximum height off the control room floor. { 2T46-R601 A should he nioved to the lef t of 2Z41-R600A. The T47 temperature indication switches 2147-R620, 2T47-R622 and 2T47-R624 are not grouped with the 2T47 displays and control switches. These temperature indicutcrs, which are unique to Unit 2, show drywell and CR0 cavity temperatures. The existing arrangement groups these instruments with other primary containment recorders and indicators. The annunciator windows are also grouped together. There is not a critical need for the T47 indicators to be grouped above the system control switches as the system operation is automatic. Therefore, these instruments can be left in their present location. RECOMMENDATION: Regroup the controls as'shown. (Jl IMPLEMENTATION: r December 31, 1992 i I I i f I 4 I l 126 , i i V f
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PANEL: 1H11-P657 and 2H11-P657 HED: 25 b) v PROBLEM: The heights of displays range from 62 inches to 80 inches. ANALYSIS: The top row of panel displays are at a center-line height of 6'-11" of f the control room floor. This takes the 4" base slab into account. Recorders 2T48-R601A and 2T46-R601A are required for Drywell Pressure / Radiation monitoring and Standby Gas Treatment flow monitoring. These two recorders are the most difficult to read on this panel and as such will be relocated. The other display instruments which are in conflict with the . height reconimendations are 6'-2" of f the control room floor. ' A small amount of pallalax is possible, which would give some inaccuracy when reading the instrument. The most critical instrument is the narrow range torus level /drywell pressure recorder (2T48-R607A). However, this instrument is being moved to 2H11-P602. The other instrument, due to space , limitation, cannot be moved. However, these instruments ' should not present any operational concerns. RECOMMENDATIONS: Relocate 2T46-R601 A, 2T48-R601 A, and 2T48-R607A. IMPLEMENTATION: December 31, 1990 for 2T48-R607A ! December 31, 1992 for 2T46-R601A and 2T48-R601A O 129
PANEL: 1H11-P657 HED: 235, 243, 245, 617 PROBLEM: Recorders 2T47-R611 and 2T47-R626 do not have point select ! capability, clearly display the channel being plotted, and ; values are not easily read. ANALYSIS: Both of these recorders have been replaced with L & N Speedomax 250 recorders since these HED's were written. Therefore, no further action is required. RECOMMENDATION: No action is required. O l l 1 130 j O _ - . - - _----_____m._______m_m __m_-
PANEL: 1H11-P657 and. 2H11-P657 HED: 295, 301, 447, 472, 628 O PROBLEM: Annunciators are not grouped above related controls, annunciators are not grouped by system, windows should be readily identifiable, and Low Low Set Logic alarms for Unit 1 should be relocated. ANALYSIS: For_the H11-P657 panels, the annunciators can be put into two categories: those annunciators for systems which are specific to Unit 1 and annunciators for systems common to both units. Under each category the annunciators are broken down between alarms with panel control switciies and displays and alarms without panel controls and displays. Common System Annunciators Those systems common to both units with panel control l switches and displays are: l T46-Standby Gas Trntment System (fan) T41-SEC system Z41-Battery Room Ventilation (fan only) T48-Primary Containment Purge and Inerting T41-Reactor Building Refueling Floor Ventilation , T47-Primary Containment Cooling l T41-Reactor Building Fan Ventilation 4
. Comparing windows between Units 1 and 2 on a one to one i basis, most of the windows on one panel have a corresponding window. The one obvious discrepancy between panels is on the T41-SEC system. For Unit 2,.the low flow and auto initiation alarms are missing.
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The systeres cominon to both units without relative controls and displays on the panel are: Gil-Radwaste System (pump trips) P33-Sample System , L51-Seismic Measuring l T45-Leak Detection / drainage Comparing the system annunciation alarms between units , indicates there is no easily implemented solution to make the j units similar. However, since no panel controls are involved, the potential for control error is minimal. Unit 1 Specific Annunciators There is only one system with control switches and displays i on 1H11-P657. This is the Z41 Control Room HVAC system. No discrepancies exist for these annunciators. 131 D c_____-____ - _ _ _ _ _ _ _ _ _ _ - _ _ _ - _ - _ - _ - _ _ _ _ _ _ - .
1H11-P657 and 2H11-P657 (continued) The system annunciators without specific controls or displays are just miscellaneous annunciator alarms on the Unit 1 panel. These are: a) Z41-Control Building Ventilation (misc) b) B21-Nuclear Boiler System R623A/B Recorder c) U41-Turbine Building Ventilation d) P70-Drywell Pneumatic System The 241 alarms in panel windows 0077 and 0078 are used to make the operators aware of a low Flow condition which should be taken. care of at a local panel. No discrepancies exist for these alarms. The B21-L/PR-R623 A/B IN HIGH SPEED MODE alarm should be moved to 1H11-P601. Its Unit 2 counterpart is on 2H11-P601. This is included in the H11-P601 analysis. However, there is no available space on 1H11-P601 for this window. The turbine building ventilation alarms have corresponding alarms on 2H11-P654. These alarms should be with the other turbine building ventilation alarms on 1H11-P654. However, there is no available space. Since the (1&2) T48-R607A recorders are being located to (l&2) H11-P602, the TORUS WATER HIGH LEVEL and TORUS WATER LOW LEVEL windows on 1H11-P657 should be combined and Is' relocated to 1H11-P602. The TORUS WATER HIGH/ LOW LEVEL on 2H11-P657 should be relocated to 2H11-P602. The annunciator panels for H11-P657 consist of one block of windows 6 high and 18 across. Short of replacing the panel with two or inore annunciator blocks having fewer windows, the most cost effective way to make windows more readily identifiable is to modify the existing annunciator box with surface enhancements. This could be included with the current surface enhancements program. ! l RECOMMENDATION: Combine TORUS WATER HIGH LEVEL with TORUS WATER LOW LEVEL on 1 1H11-P657 and move to 1H11-P602. Move the four Low Low Set Logic alarms from 1H11-P657 to 1H11-P602. Regroup the PCIS Signal Override annunciators on 1H11-P657 as shown. IMPLEMENTATION: December 31, 1989 132 O
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PANEL: 1H11-P657 and 2H11-P657 HED: 319, 745 PROBLEM: Several alarms have multiple inputs and panel system trouble alarms should indicate panel function. ANALYSIS: Annunciator alarms on H11-P657 which do not have panel function indicated should be corrected with surface enhancements (the engraving on the window). There is no engineering modification to correct this problem. 1H11-P657 Multiple Inputs j I Window No. Title ! 0009 T48-R601 A/B IN HIGH SPEED MODE i 0011 SEC SYSTEM COOLER A OR B LOW FLOW i D012 SEC SYSTEM COOL 3A OR B LOW FLOW ) 0016 SEC SYSTEM COOL SA OR B LOW FLOW D017 SEC SYSTEM COOL 2A OR B LOW FLOW 0018 SEC SYSTEM COOL 4A OR B LOW FLOW { D029 CONTROL ROOM HVAC UNITS 3A, B HIGH DISH l RAD. l 0033 DW/ TORUS N2 MAKEUP 2" ISO VALVES OPEN l 0034 DRYWELL TORUS HIGH PRESSURE 0067 B21-R623A/B IN HIGH SPEED MODE D106 MULTI-POINT TEMP. REC R611 HIGH TEMP. Windows D009 and D067 are alarms for the recorder chart speeds. For an alarm, if one or both the recorders go into high speed mode, verification is made at each recorder. Windows 0011,12,16,17 and 18 indicate Low Flow for one of two coolers. The 1 A cooler control switches are on H11-P657 and 18 cooler control switches are on H11-P654, which is next to panel H11-P657. Because these panels are next to each other the controls are easy to access as needed. Only one of the two coolers is operated at a time; the other is on standby. Therefore, only one alarm is possible at a time, i For window 0029, the annunciator response procedure has the i same required actions regardless of which HVAC unit gives the alarm. i i 1 135 1 l O v o-- ---- -- -- - i
1H11-P657 and 2H11-P657 (continued) Window D033 indicates when one or nere of the 2" vent isolation valves are open. The corresponding control O switches for the vent. valves are on the H11-P657 panel below the alarm. Any open valves can be' verified'and the appropriate action .taken from the control panel. Window D034 is the annunciator alarm for T48-PR-R608 which. records drywell and torus' pressure. In the event of an i alarm, the recorder is observed to tell which pressure setpoint has tripped. Alarm from either input requires specific operator action to be taken. Window D106 indicates a high . temperature on the T47-TR-R611. recorder. .In the event of.an alarm, the temperature inputs on the' recorder would be observed for,the origin of the alarm._ The annunciation response procedure gives the alarm setpoints for each input point on the recorder. The multiple inputs, as explained above, have either
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appropriate operator actions to indicate the source-of the , annunciator alarm or only one input at a-time is possibleito the annunciator. In a few of the above' cases,. separate. alarm 3 windows might decrease the initial response time to the L! alars; however, the actions required by these alarms.do not' ' require immediate response. Therefore, no alarm separation is required. , 2H11-P657 Multiple Inputs Window No. Title D033 DW/ TORUS N2 MAKEUP 2" ISO VALVES OPEN , D034 DRYWELL/ TORUS HIGH PRESSURE 0036 TORUS WATER HIGH/ LOW LEVEL: D038 DRYWELL/ TORUS' RECORDERS R626 HIGH TEMP l 0071 RBCCW PUMP DISCH SAMPLE HIGH/ LOW PH D103 REFUEL. FLOOR FILTERS 0007/8 W1R SPRAY ON-D106 MULTI-POINT TEMP REC R611 HIGH TEMP. Window D033 indicates when one or more of'the 2" vent 'i isolation valves are open. The corresponding control switches for the vent valves are on.the H11-P657 panel below ] the alarm. Any open valves can be verified and=the . appropriate action taken from the control panel. Window D034 is the annunciator alarm for T48-PR-R608 which i records drywell and torus pressure. In the event of an , alarm,- the recorder is observed .to tell which pressure - l setpoint has been tripped. Alarm from either input. requires j that specific operator action'be taken.. j q 136
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1H11-P657 and 2H11-P657 (continu::d) Window 0036 is the annunciator alarm for T48-L/PR-R607A which records narrow range torus water level /drywell pressure. In the event of an alarm the recorder reading is verified and [* the appropriate action can be taken. Window 0038 indicates a high temperature on the T47-TR-R626 recorder. In the event of an alarm the temperature inputs on the recorder would be observed for the origin of the alarm. The annunciator response procedure gives the alarm setpoints for each input point on the recorder. Window 0071 indicates RBCCW pump discharge sample High or Low Ph. Both alarms are not possible at the same time. Window D103 (setpoint 1800 % 50F inc.) is actuated by a temperature switch / relay circuit which should also stop exhaust f an 2T41-C005A/2T41-C0058. An independent circuit with the'same temperature setpoint may have opened a deluge valve to the affected filter. The reactor building refueling zone ventilation supply fan 2T41-C002A/2T41-C0028 should have tripped when the exhaust fan tripped. The effected control switches are on panel H11-P657. Window D106 indicates a high temperature on the T47-TR-R611 recorder. In the event of an alarm the temperature inputs on the recorder would be observed for the origin of the alarm. The annunciator response procedure lists the alarm setpoints - O for each input point on the recorder. O The multiple inputs, as explained above, have either-appropriate operator actions to indicate the source of the annunciator alarm or only one input at a time is possible to the annunciator. In a few of the above cases separate alarm windows might decrease the initial response time to the alarm; however, the actions required by these alarms do not require immediate response. Therefore; alarm separation is not required. RECOMMENDATION: Alarm separation is not required. 137 O
PANEL: 1H11-P700 and 2H11-P700 HED: 39 PROBLEM: The panels do not have the same layout between Units 1 and 2. ANALYSIS: H11-P700 is a miscellaneous panel. It contains a variety of systems with poor component grouping. 1H11-P700 has been compared with 2H11-P700 for functional grouping and similarity between units. Sever 61 component relocations are needed to transform this panel into a functional and organized cabinet. RECOMMENDATION: Regroup the components on 1H11-P700 and 2H11-P700 as shown. IMPLEMENTATION: December 31, 1992 0 I 138 O
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PANEL: 1H11-P700 and 2H11-P700
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\-} ( PROBLEM: Annunciator locations are not consistent between Units 1 & 2. ANALYSIS: ANNUNCIATOR PANEL "Y" IN BAY A Windows YO2, Y03, YO4, YOS, YO6, Y08, YO9, Y10, Y11, Y12, Y15, Y16, Y17, Yl8, Y19, Y20, Y21, Y22, Y23, Y24, Y25, Y26, and Y27 are inconsistent between Unit 1 and Unit 2. The inconsistency is caused by equipment differences between the two units. Windows Y02, YO3, YO4, Y05, YO6, YO9, Y10, Y11, Y12, Y15, Y16, Y17. Yl8, Y19, Y20, Y21, Y22, Y23, and Y24 on 1H11-P700 contain Reactor Building Instrument Air annunciators. These annunciators are specific to Unit 1 and are logically arranged. Windows Y25, Y26, and Y27 on 1H11-P700 contain Waste Gas Treatment Building annunciators. These annunciators are specific to Unit 1 and are logically arranged. Windows YO4, YOS, YO6, Y08, YO9, and Y15 on 2H11-P700 contain Turbine Building Instrument Air Annunciators. These , annunciators are specific to Unit 2 and are logically 7-ss arranged except for window Y15. Window Y15 c.ontains TURBINE ( ) BUILDING INSTRUMENT AIR ESSENTIAL SUP LOW PRESSURE
annunciator. It is recommended that this annunciator be moved to window YO3.
Window YO2, RB Instr Air, on 2H11-P700 is specific to Unit 2 and is appropriately located with RB Instr Air annunciator located at Y01. Windows Y10, Yll, Y12, Y15, Y16 Y17, Yl8, Y19, Y20, Y21, Y22, and Y24 on 2H11-P700 contain Waste Gas Treatment Building and Control Building annunciators. These annunciators are specific to Unit 2 and are logically arranged except for windows Y23 and Y24. It is recommended that annunciators Y23 and Y24 interchange locations. Other windows on 2H11-P700 are miscellaneous annunciators that are specific to Unit 2. No changes are recommended. ANNUNCIATOR PANEL "Z" IN BAY B Windows 206, 107, ZO8, 209, 210, Z13, Z14, Z15, 217, Z18, Z19, 220, 221, Z22, 223, Z24, Z25, Z26, and Z27 are inconsistent between Unit 1 and Unit 2. The inconsistency is caused by equipment differences between the two units. rs 143
I 1H11-P700 and 2H11-P700 (continued) Windows 208, Z17, Z18, 219, Z20, 221, Z22, and 223 on 1H11-P700 contain Recombiner Building annunciators. These I l p) annunciators are specific to Unit 1 and are arranged l logically with the exception of 708. It would be recommended to move the annunciator in 208; however, the panel is filled and any move would cause additional arrangement problems. Therefore, it is recommended that no changes be made. l Windows 206 and Z10 on 1H11-P700 contain Drywell Pneumatic System annunciators. These annunciators are specific to Unit 1 and are arranged logically with similar annunciators in-windows 201, 202, 203, 204, 205, 211, and Z12. Windows Z19, 225, 226, and 227 on 1H11-P700 contain Waste Gas Treatment Building annunciators. These annunciators are specific to Unit 1 and are arranged logically. Windows Z13 and Z14 on 1H11-P700 contain Main Turbine Area and Main Condenser Area leak detection annunciators. These annunciators are appropriately grouped together. Windows 208,'ZO4, Z14, and Z15 on 2H11-P700 contain Reactor /Radwaste Building Chiller System annunciators. These annunciators are specific to Unit 2 and are arranged logically. Windows 207, Z10 and 213 on 2H11-P700 contain Drywell Pneumatic System annunciators that are specific to Unit 2. They are grouped logically with annunciators at* windows Z01, 202, Z03, 204, 205, Z11, and Z12. Windows Z19, Z20, Z25, and 226 on 2H11-P700 contain Turbine Building and Reactor Building Chilled Water System I annunciators that are specific to Unit 2. They are grouped logically. Other windows on 2H11-P700 contain miscellaneous annunciators that are specific to Unit 2. No changes are recommended. RECOMMENDATION: Regroup annunciators on 2H11-P700 as shown. IMPLEMENTATION: December 31, 1989 144
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PANEL: 1H11-P700 and 2H11-P700 HED: 316, 319 PROBLEM: Several alarms have multiple inputs. ANALYSIS: PLANT HEATING EXPANSION TANK HI/LO LEVEL 2P44-N015A measures low level in expansion tank 2P44-A002. 2P44-N015B measures high level in expansion tank 2P44-A002. On low tank level 2P21-F118 automatically opens to refill the tank from the Demineralized Water System. If the tank overfills the overflow will dump to the Chemical Radwaste System with no operator action required. Because high and low levels are automatically compensated for and because this system will have no impact on safety, alarm separation is not required. TB CHILL WTR EXPAN TANK HI/LO LEVEL 2P63-N003A measures low level in expansion tank 2P63-A001. 2P63-N0038 measures high level in expansion tank 2P63-A001. On low tank level 2P63-F028 automatically opens to refill the tank from the Demineralized Water System. If the tank overfills the overflow will dump to the Dirty Radwaste System with no operator action required. Because high and low levels are automatically compensated for and because this system will have no impact on safety, alarm separation is not required. RB CHILL WTR EXPAN TANK HI/LO LEVEL 2P64-N054 measures low level in expansion tank 2P64-A001. 2P64-N055 measures high level in expansion tank 2P64-A001. On low tank level 2P21-F112 automatically opens'to refill the tank from the Demineralized Water System. If the tank overfills the overflow will dump to the Dirty Radwaste System with no operator action required. Because high and low levels are automatically compensated for and because this system will have no impact on safety, alarm separation is not required. RCB BLDG SYSTEM TROUBLE Upon receipt of the RCB BLDG SYSTEM TROUBLE alarm, the Annunciator Response Procedure 34AR-700-010-1 requires that personnel go to panel H21-P166 to respond to the alarm. It also requires that instruments on panel N62-P600 be monitored. This action will have no impact on safety and is, therefore, acceptable. No changes are recommended. 147 _ _ z
1H11-P700 and 2H11-P700 (continued) TURBINE BLDG. CHILLED WATER SYSTEM TROUBLE h Upon receipt of the TURBINE BLDG. CHILLED WATER SYSTEM TROUBLE alarm, the Annunciator Response Procedure 34 AR-700-014-1 requires the operator to determine which unit has tripped (A or B), to check for concurrent Turbine Building Chilled Water System alarms on panel H11-P700, and to start the standby unit. These actions will have no impact on safety and is, therefore, acceptable. No changes are i recomended. . RADWASTE BLDG. VENT SYSTEM TROUBLE MAIN TURB COND. OIL STORAGE TANK TROUBLE These alarms are not located on H11-P700. RECOMMENDATION: Alarm separation is not required. 4 e 148 4 e
PANEL: 1H11-P702 and 2H11-P702 HED: 39 l PROBLEM: The Unit 1 and Unit 2 panels do_not have the same layout. ANALYSIS: H11-P702 contains an array of approximately one hundred (100) { excess flow check valve pushbutton switches. The switches 1 are placed in numerical order accordin9 to valve MPL' number. ] Because Unit i valve numbers are'not identical to Unit 2 i valve numbers, the panels do not have an identical layout. 4 l However, since each panel positions the switches in numerical order, there is no confusion between the Unit 1 and Unit 2 layouts. j RECOMMENDATION: No changes are recommended. j O
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i PANEL: 1H11-P702 and 2H11-P702 j HED: 254, 255 PROBLEM: The indicating lights on-these panels are dim and not 1 visually distinctive. ! ANALYSIS: The indicating lights referenced by these HED's are an integral part of excess. flow check valve bypass switches. ! Generally, each pushbutton switch has red and green indication as well as an "0 PEN" and " CLOSED" plastic insert. A few of the switches are missing the inserts. It. appears to be redundant to have both red and green indication, and "0 PEN" and " CLOSED" inserted labels. In-addition, those switches missing the insert appeared considerably brighter than those with the insert. Modification to the switches and improved labeling should correct this discrepancy. RECOMMENDATION: Add a color key label on the panel defining the red and green lights. Remove the "0 PEN" and " CLOSED" plastic inserts. IMPLEMENTATION: December 31, 1990 O l 4 1 150 A V 1
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