ML19320C521
| ML19320C521 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 06/13/1980 |
| From: | Vandenburg D Maine Yankee |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-06, IEB-80-6, WMY-80-94, NUDOCS 8007170321 | |
| Download: ML19320C521 (9) | |
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"""I"'T'c ENGINEERING OFFICE WEST 8ORO, MASSACHUSETTS 01581 617-366-9011
%#O June 13, 1980 B.4.1.1.
hMY 80-94 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention:
Mr. Boyce H. '.scier, Director References :
(a)
Licent.e No. DPR-36 (Docket No. 50-309)
(b) USNRr, Letter to MYAPC, dated March 13, 1980, IE Bulletin No.
80-C5
Dear Sir:
Subject:
Response to IE Bulletin No. 80-06, Engineered Safety Feature (ESP) Reset Controls Your letter, Reference (b), requested a review of logic drawings for all systems serving safety-related functions to ensure that all associated safety-related equipment remains in its emergency mode upon reset of the ESF actuation signal.
You also requested a test be conducted to verify the installed instruments and controls are consistent with the logic drawings, and to plan appropriate corrective action as required. providea a response to the concerns discussed above. We trust you find this infomation satisfactory; however should you desire further details, please do not hesitate to contact us.
Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY hex D. E. Vandenburgh Vice President COMMONWSALTH OF MASSACHUSETTS)
)ss j
CCUNTY OF WORCESTER
)
Then personally appeared before me, D. E. Vandenburgh, who, being duly sworn, did state that he is a Vice President of Maine Yankee Atomic Company, that he is duly authorized to execute and file the foregoing request in the name and on the Dehalf of Maine Yankee Atomic Power Company, and that the statements therein are true to the best of his knowledge and ief.
a t
R. H. Groce Notary Public My Commission Expires September 14, 1984 8007170 3 p
e.
Question 1.
Review the drawings for all systems serving safety-related functions at the schematic level to determine whether or not upon the reset of an ESF actuation signal, all associated safety-related equipment remains in its emergency mode.
Answer This review has been completed and the result is documented in our response to Question 3 Question 2.
Verify the actual installed instrumentation and controls at the facility are consistent with the schematics reviewed in Item 1 above by conducting a test to demonstrate that all equipment remains in its emergency mode upon removal of the actuating signal and/or manual resetting of the various ie lating or actuation signals.
Provide a schedule for the performance of the testing in your response to this Bulletin.
Answer As is documented in our response to Item 2.1.4 of NUREG-0578
" Containment Isoation", Reference (a), changes were made to preclude automatic loss of containment isolation as a result of resetting containment isolation. signals, whether manual reset or removal of the actuating signal.
this change was verified by test during the last refueling outage (March 1980),
therefore no additional tests will be scheduled on containment isolation.
1 of 8
Enclorura 1 Due to the complexity of testing the two remaining systems at powar, the Safety Injection Actuation System and the Containment Spray System, the tests will be accomplished during the next extended unscheduled cold shutdown or during the next refueling outage, now scheduled for June 1981.
Question 3 If any safety-related equipment doec not remain in its emergency mode upon reset of an ESF signal at your facility, describe proposed system modification, design change, or other corrective action planned to resolve the problem.
Answer Table 1 documents the results of our review per question 1.
The containment isolation system is not listed in Table 1 due to the fact that all review and testing was done during the March 1980 refueling outage and that no modifications need be done.
A design change is being prepared to modify safety-related equipment that presently does not remain in its emergency mode, upon reset of an ESF signal at Maine Yankee; with the exception of some equipment for which we will provide further details and justification not later than August 1, 1980.
The projected schedule for completion if the design change will be during the Jane 1981 refueling outage.
2 of 8
Enclorura 1 TABLE 1
, Safety Reference to Return to Component Actuation Control Circuitry Normal Description System Service Signal 11550-After Reset P-14A, B, S High Pressure Safety Injection Pump SIAS Starts ESK-5AN, SAW Yes HCV-204T Charging Pump Suction From RWST SIAS Opens ESK-7K, 7M Yes (HSI-M-51) 1.29-104B HCV-204U Charging Pump Suction From RWST SIAS Opens ESK-7J, 7M Yes (HSI-M-50) 1.29-104B LCV-204V Volume Control Tank to Charging PPS SIAS Closes ESK-7L No (CH-M-1) 1.29-105B LCV-204S Volume Control Tank to Charging PPS SIAS Closes ESK-7L No (CH-M-87) 1.29-105B HCV-301 Charging Pump Outlet to Auxiliary SIAS Opens ESK-7M, 7J No (HSI-M-41)
High Pressure Header 1.29-60D HCV-302 Charging Pump Outlet to liigh Pressure SIAS Opens ESK-7K, 7M No (H3I-M-42)
Header 1.29-60D HCV-313 Safety Injection System High Pressure SIAS Opens ESK-7J, 7M No (HSI-M-12)
Auxiliary Header to Loop 1 1.29-64D HCV-323 Safety Injection System High Pressure SIAS Opens ESK-7M, 7J No (HSI-M-22)
Auxiliary Header to Loop 2 1.29-64D HCV-333 Safety Injection System High Pressure SIAS Opens ESK-7M, 7J No (HSI-M-32)
Auxiliary Header to Loop 3 1.29-64D 3 of 8
Enclorura 1.
TABLE 1 (continued)
Safety Reference to Return to Component Actuation Control Circuitry Normal Description System Service Signal 11550-After Reset HCV-311 Safety Injection System High Pressure SIAS Opens ESK-7K, 7M No (HSI-M-ll)
Header to Loop 1 1.29-64D 4
HCV-321 Safety Injection System High Pressure SIAS Opens ESK-7K,,7M No (HSI-M-21)
Header to Loop 2 1.29-64D HCV-331 Safety Injection System High Pressure SIAS Opens ESK-7K, 7M No (HSI-M-31)
Header to Loop 3 1.29-64D HCV-254 Charging Line Stop Valve SIAS Closes ESK-7M, 7K Yes (CH-A-33) 1.29-35C HCV-255 Charging Line Stop Valve SIAS Closes ESK-7H, 7K Yes (CH-A-32)-
1.29-35C HCV-314 Safety Injection Tank Fill Valves SIAS Closes ESK-7J, 7M Yes (SIA-A-12) 1.29-28C HCV-324 Safety Injection Tank Fill Valves SIAS Closes ESK-7J, 7M Yes (SIA-A-22) 1.29-28C HCV-334 Safety Injection Tank Fill Valves SIAS Closes ESK-7J, 7M Yes (SIA-A-32) 1.29-28C P-12A, B Low Pressure Safety Injection Pumps SIAS Starts ESK-5AP, 7M No RAS STOPS 4 of 8
~
Enclorure 1 TABLE 1 (continued)
Safety Reference to Return to Component Actuation Control Circuitry Normal Description System Service Signal 11550-After Reset.
HCV-312 Safety Injection System Low Pressure SIAS Opens ESK-7J, 7M No i
(LSI-M-ll)
Header to Loop 1 1.29-106A HCV-322 Safety Injection System Low Pressure SIAS Opens ESK-7J, 7M No (LSI-M-21)
Header to Loop 2 1.29-106A HCV-332 Safety Injection System Low Pressure SIAS Opens ESK-7J, 7M No (LSI-M-31)
Header to Loop 3 1.29-106A FCV-212 Charging Flow Control Valve SIAS Closes ESK-7K, 7M Yes (CH-F-38)
LCV-210Z Boric Acid Tank to Chemical Tank SIAS Closes ESK-7K, 7M Yes (BA-A-32) 1.29-34C TCV-20lK Ht Ex E-67 Letdown Temperature SIAS Closes ESK-7J, 7M Yes (LD-T-5)
Control Valve 1.29-103H SOV-4008A Charging Pump Primary System Isolation SIAS Closes ESK-7J, 7M Yes (CH-S-119)
SOV-4009A Charging Pump Primary System Isolation SIAS Closes
SOV-4008B Charging Pump Primary System Isolation SIAS Closes ESK-7J 7M Yes (CH-S-120) 5 of 8
Ehclecura 1 TABLE 1 (continued)
Safety Reference to Return to Component Actuation Control Circuitry Normal Dencription System Service Signal 11550-After Reset SOV-4009B Charging Pump Primary System Isolation SIAS Closes ESK-7K, 7M Yes (CH-S-122)
PCV-211 Seal Water Pressure Containment for RCP SIAS Closes ESK-7K, 7M Yes (SL-P-3) 1.29-29C HCV-242 Letdown Isolation Valve to Regen HX E-67 SIAS Closes ESK-7K, 7M No (LD-M-2) 1.29-61C FCV-216 Charging PPS to Loop Fill Hdr. Isolation SIAS Closes ESK-7L Yes (CH-F-70)
Valve 1.29-66D 4
P-61A, B, S Containment Spray Pumps.
SIAS Starts ESK-5AU, SAK, 7M No 4
MOV-3211 "A" Train Inlet Header Stcp to Spray CSAS Opens ESK-7B, 6BN No (CS-M-1)
Ring MOV-3212 "B" Train Inlet Header Stop to Spray CSAS Opens ESK-7B, 6BN No (CS-M-2)
Ring MOV-3213 Spray Chemical Line to Refueling Water CSAS Opens ESK-7B, 6BR No (CS-M-66)
Storage Tank MOV-3214 Spray Chemical Line to Refueling Water CSAS Opens ESK-7B, 6BR No (CS-M-71)
Storage Tank jTV-3412 Reactor Containment Recirculation Coolers CSAS Closes ESK-7B No (PCC-A-238)
Outlet Header Isolation 6 of 8 4
TABLE 1 (continued)
Safety Reference to Return to Component Actuation Control Circuitry Normal Description System Service Signal 11550-After Reset
<TCV-1720 Hydrogen Coolers Outlet Temperature CSAS Closes ESK-7B Yes (SCC-T-227)
Control TCV-1721 Turbine Oil Coolers Outlet Temperature CSAS Closes ESK-7B Yes (SCC-T-257)
Control iTCV-172'2 Electro Hydraulic 011 Coolers Temperature CSAS Closes ESK-7B Yes (SCC-T-315)
Control FN-44A, B Spray Pump Room Exhaust Fan SIAS Starts ESK-6CK, 7L Yes MOV-1701 Residual Heat Exchange Outlet RAS Opens ESK-7F, 6BK No
-(SCC-M-165)
MOV-3202 LPSI PP Return to Refuel TK Safeguard RAS Closes ESK 7E, 6BQ No (SlA-A-53)
Recire. Stop to RWST MOV-3204 LPSI PP Return to Refuel TK Safeguard RAS Closes ESK 7F, 6BQ No (SlA-A-54)
Recire. Stop to RWST MOV-3205 Refuel Water Tank Outlet to Safeguard RAS Closes ESK 7E, 6BP No (LSl-M-41)
Pumps MOV-3206 Refuel Water Tank Outlet to Safeguard RAS Closes ESK 7F, 6BP No l
(LSl-M-:1)
Pumps MOV-3207 Containment Sump RAS Opens ESK 7E, 6BP No (CS-M-91) 7 of 8 l
Encisoure 1 TABLE 1 (continued)
Safety Reference to Return to Component Actuation Control Circuitry Normal Description System Service Signal 11550-After Reset MOV-3208 Containment Surp RAS Opens ESK 7F, 6BP No (CS-M-91),
lMOV-3209 RES Heat Exchanger to Charging Pumps RAS Opens ESK 7E, 6BN No
~
(HSl-M-54)
!MOV-3210 RES Heat Exchanger to Charging Pumps RAS Opens ESK 7F, 6BN No (HSI-M-55) iMOV-3401 Residual Heat Exchanger RAS Opens ESK 7E, 6BK No (PCC-M-43)
ESK 7E, 6BL No
[
lMOV-3402 Primary Component. Coolant Water Inlet RAS Closes (PCC-M-90) to Aux Bldg.
jMOV-3403 Primary Component Coolant Water to RAS Closes ESK 7E, 6BL No (PCC-M-150)
RC Heat Exchangers ISOV-3217A Air Control to FCV-3217A RAS Opens 75 Yes FCV-3217A - Vent HDR to Containment l
lSOV-3217B Air Control to FCV-3217B RAS Opens 7F Yes FCV-3217B - Vent HDR to Containment HCV-204T, U HPSI Suction RAS Closes 7F, 7E Yes 4
1.29-104B 8 of 8 i
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