ML19294B213
| ML19294B213 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Trojan |
| Issue date: | 01/22/1980 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Dunn C DUQUESNE LIGHT CO. |
| References | |
| TAC-44632, NUDOCS 8002270566 | |
| Download: ML19294B213 (9) | |
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o, UNITED STATES e
g NUCLEAR REGULATORY COMMISSION y
WASHINGTON,0. C. 20555 3 *-
\\,...../pE January 22, 1980 Docket No. 50-334 Mr. C. N. Dunn, Vice President Operations Division Duquesne Light Company 435 Sixth Avenue Pittsburgh, Pennsylvania 15219
Dear Mr. Dunn:
On flovenber 15, 1979, Duquesne Light Company responded to our request of October 11, 1979 on NRC requirements for the auxiliary feedwater systems at the Beaver Valley Power Station, Unit No.1.
Enclosed is our request for additional information and positions resulting from our review of your November 15 submittal.
The open items in the enclosure must be resolved in a manner acceptable to the staff before the auxiliary feedwater system safet.) evaluation report can be issued.
It is requested that you provide your response to our reques within 30 days so that we can proceed with our review.
Sincerely,
/
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A. Schwencer, Chief Operating Reactors Branch #1 Division of Operating Reactors
Enclosure:
As Stated cc: w/ enclosure See next page 00 0227g D&&
Mr. C. ft. Dunn Duquesne Light Company
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Ja nuary 22, 1980 cc: Gerald Charnoff, Esquire Mr. James A. Werling Jay E. Silberg, Esquire Plant Superintendent Shaw, Pittman, Potts and Trowbridge Beaver Valley Power Station 1800 M Street, ft.W.
P.-0. Box 4 Washington, D. C.
20036 Shippingport, Pennsylvania 15077 Karin Carter, Esquire Mr. John A. Levin Special Assistant Attorney General Public Utility Commission Bureau of Administrative Enforcement P. O. Box 3265 5th Floor, Executive House Harrisburg, Pennsylvania 17120 Harrisburg, Pennsylvania 17120 fir. Roger Tapan Stone and Webster Engineering Corporation P. O. Box 2325 Boston, Massachusetts 02107 lir. J. D. Woodward R & D Center Westinghouse Electric Corporation Building 7-303 Pittsburgh, Pennsylvania 15230 B. F. Jones Memorial Library 663 Franklin Avenue Aliquippa, Pennsylvania 15001 Mr. Jack Carey Technical Assistant Duquesne Light Company P. 0. Box 4 Shippingport, Pennsylvania 15077 Mr. R.
E'. Martin Duquesne Light Conpany 435 Sixth Avenue Pittsburgh, Pennsylvania 15219 Marvin Fein Utility Counsel City of Dittsburgh 313 City-County Building Pittsburgh, Dennsylvania 15219
A.
Short Term Recommendations 1.
Recommendation GS-3 We do not require further information from the licensee on this recom-mendation. This is batt
,o our understanding (1) the.t NP.C has reviewed the issue of the potential feedwater flow instability (water hammer), and a license amendment will be issued to delete the license condition of AFW flow limitation from the Beaver Valley Oper3 ting license prior to startup from the present shutdown and (2) that the licensee will restore AFW system flow to the minimum flow required by the FSAR.
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2.
Recommendation GS 4
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The licensee's response is acceptable.
3.
Recommendation GS-6 The licensee's response is acceptable.
4.
Recommendation GS-7 The licensee's response to our recommendation GS-7 is not satisfactory.
The licensee states that the AFW automatic initiation system signals and circuitry meet safety grade. We require that the licensee provide information that describes how the AFW automatic iniciation system design meets eitner (1) safety grace per the provisiens of IEEE 273 for the long term (1/1/81) or (2) each of the control grade functional criteria in NUREG 3578 (2.1.7a) and the clarifications to NUREG 0579 in the October 30, 1979 NRC (H. Centon) letter to all operating
2-plants for the short tern (1/1/80).
The information should be suf-ficiently descriptive to permit independent technical review of the information and a conclusion that each of the criteria are met.
To demonstrate conformance with criteria 1, 2, 5 and 7, specific descriptive information (reference to specific FSAR sections is acceptable) supported by electrical drawin;s, such as schematic or elementary wiring diagrams should be submitted.
For power supply criteria 4 and 6, the licensee should submit a table or a detailed power distribution one-line diagram indicating power supply channels for each component.
To~ demonstrate testability cri-terion 3, tne licensee should submit a su.- ary description of the functional test procedures along with the existing or proposed test interval (e.g. Standard Technical Specification surveiIiance require-ments for typical engineered safety feature systems).
5.
NEC Short Term Plant Soecific Pecommendation No. 5 The licensee's response is acceptable provided that the prcposed Technical Specifications specify a 31 day test frequency for the normally closed manually operated suction valves from the river 4
water system to the AFWS.
6.
NRC Short Te-n Plant Soecific Recommendation No. 6 The licensee's response is acceptable.
3 7.
fiRC Short Term Plant Specific Recommendation No. 7 The licensee's response is not satisfactory. We require that the licensee provide the results of his review of the present alignment of the AFW system discharge block valves for the normal, transient and accident conditions for staff's review indicating any valve alignment modification before returning the station to power operation.
Also, the licensee has not responded to our request for information (Enclosure 2 to NRC letter dated October 11,1979) related to API system flow adequacy for plant transients and accidents.
The licen-see should commit to respond to this item.
B.
Additional Short Term Recommendations
--r 1.
The licensee's response to this recommendation is not satisfactory.
We require the licensee tu provide th? following: 1) Confirm that the Beaver Valley Statici existir.g design consists of redundant conop.iate storage tank level indications as well as redundant level alarms inside the contrril room.
- 2) Verify that the above level indications and alarms sre redundant all the way from the detectors at the' condensate storage tank to the readouts and alarms inside the control room.
Powe* supplies for tne level indication and alarms should be reduniant.
Since tne condensate storage tank is seismic Category I watar source, the entire water level indication and alarm system shou'd in the long term (1/1/80) be designed to safety grade requirements including the use of Class lE circuitry ar d ta ve-s.cclies.
!n the stor-
.er...se c" con : lass ' E circuite; aad p0wer supplies are acceptable crovided one oower train has a
. back-up battery source.
- 3) Verify that the additional low-low level alarm will be redundant and the setpoints will allow at least 20 minutes for operator action, assuming that the largest capacity APW pump is operating.
2.
The licensee's response to this recommendation is acceptable provided the licensee commits to follow the provisions of the revised Additional Short Term Recommendation t'o. 2 attached.
3.
The licensee's response to this recommendation is not satisfactory.
We require information of a similar nature to that described in GS-7 above to demonstrate con formance with the 2.1.7.b criteria and clarifications to NUREG 0578 in the October 30,1979 NRC (H.
Denton) letter to all operating plants; namely, single,, failure,
testability, power supply and indication accuracy (reference to specific FSAR sections is acceptable).
4 The licensee's response is acceptable.
C.
Lon Term Recommendation 1.
Recommendation GL-5 The licensee does not address this item in his response.
If the licensee can demonstrate in his response to our short term recen-mendation No. 4 (GS-7) that the existing AFW automatic initiation system meets safety grade requirements, then this recommendation wculd not apply to Beaver Valley Station.
2.
NPC Lono Term Plant Soecific Recommendation No. 2 The licensee does not address this item in his response.
We require that licensee provide the results of an analysis to address our concerns in this item and the analysis should be consistent viith his AFWS flow design basis that the licensee should provide for NRC review per Enclosure 2.
<eum.
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.e
Revision to Recommendation No. 2 of " Additional Short Terr Recommendations" Regarding Auxiliary Feedwater pump Endurance Test The licensee should perform an endurance test on all AFK' system pumps. The test should continue for at least 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after achieving the following test conditions:
- Pump / driver operating at rated speed and
- Pump developing rated discharge pressure and flow or some higher pressure at a reduced flow but not exceeding the pump vendor's maximum permitted discharge pressure value for a
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48-hour test
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- For turbine drivers, steam temperature should be as close to normal operating steam temperature as practicable but in no case should the temperature be less than 400*F.
Following the 48-hour pump run, the pumps should be shut down and allowec to cool down until pump temperatures reduce to within 20'F of their values at the start of the 48-hour test and at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> have elapsed.
Following the cool down, the pumps should be restarted and run for one hour. Test acceptance criteria should include demonstrating that the pumps remlin within* des'gn lirits r't' re:pe:t to 5:arir.7/ bearing c(1 ttipera-tures and vibration and that ambient pump room conditions (temperature, humidity) do not exceed environmental qualification limits for safety-related equipment in the room.
The licensee should provide a summary of the conditions and results of the tests. The ruar.iry sh: Ad ir:1cce t'n f:'1:c. 7
-) A br e. ic:t ' : tie-i of the test methai (including flow schematic diagram) and how the test
T 2-was instrumented (i.e., where and how bearing temperatures were measured).
- 2) A discussion of how the test conditions (pump flow, head, speed and steam' temperature) compare to design operating conditions.
- 3) plots of b' earing / bearing oil temperature vs. time for each bearing of each AFW pump / driver demonstrating that temperature design limits were not exceeded. 4) A plot of pump room ambient temperature and humidity vs.
time demonstrating that the pump room ambient conditions do not exceed environmental qualification limits for safety-related equipment in the room. 5) A statement confirming that the pump vibration did not exceed allowable limits during tests.
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