ML17037B536

Letter Regarding a Report Entitled Plant Unique Analysis Report for Torus Support System and Attached Piping for Nine Mile Point Nuclear Power Station.

ML17037B536
Person / Time
Site:	Nine Mile Point
Issue date:	09/02/1976
From:	Schneider R Niagara Mohawk Power Corp
To:	Lear G Office of Nuclear Reactor Regulation
References
TR-2271(a)
Download: ML17037B536 (8)

Text

NHC FonM 196 U.S. NUCLLAn REoULATOnV MIS ION DOCKLT NUMDER

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DESCRIPTION ENCLOSURE LTR REF THEIR 7<<30-76 LTR........ TRANS THE FURN REPLACEMENT PAGES 17 AND 71 FOR THE FOLLOWING[ ~ ~ ~ ~ ~ ~ FLANT UNIQUE ANALYSIS REPORT FOR TORUS SUPPORT SYSTEM AND ATTACHED PIPING FOR NINE MILE, POINT DATED 7-30<<76.................

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($8, September 2, l976 Oz tf) c5 Director of Nuclear Reactor Regulation Attn: Mr. George Lear, Chief Operating Reactors Branch g3

~/Py U. S. Nuclear Regulatory Commission Washington, D. C. 20555 +zz o+

Re: Nine Mile Point Unit l Docket No. 50-220 DPR-63

Dear Mr. Lear:

Our letter of July 30, l976 transmitted a report en-titled "Plant Unique Analysis Report'or Torus Support System and Attached Piping for Nine Mile Point Nuclear Power Station."

Attached are replacements f'r pages l7 and 7l which supply corrected or missing information. These changes are denoted by vertical margi nal 'markings.

Very truly yours, NI'AGARA MOHAWK POWER CORPORATION R. R. SCHNEIDER Vice President - Electric Production

/sz Attachment

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0 1 "r>" IH <DYNE MATERlALS RESEARCH Technical Report TR-2271(a }

TABLE 2.0 PIPING SYSTEt1S.

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'Ss Diameter Thickness uantit ~ln.' ~ln.

Containment Spray Pump Suction 12 .375 Core Spray Pump Suction '12 .375 Torus Spray Header . 237 Containment Spray Test .125 Vacuum Breakers 30 . 500 Core Spray Testline .125 Suppression Vessel Air Vent and Fill 1 20 .375 Conden'sate Makeup 1 8 .125

[ Suppression Vessel ii2 Vent and Fill 1 20 .375

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'.chnical Report MATER(ALS RESEARCH

'.<-2271 (a) -7.1-TABLE 11 VITAL PIPING SYSTEMS STRESS VALUE (ksi)

PIPING SYSTEM EVAI UATED CALCULATED ALLOWED CONTAIHMEHT SPRAY. PUMP SUCTION 21.4 45.0 CORE SPRAY PUMP SUCTION 11.2 45.0 TORUS SPRAY HEADER SUPPLY 8.0 45.0 VACUUM BREAKER LINES 6.0 45,0 TABLE 12 NON-VITAL PIPING SYSTEMS STRESS VALUES (ksi)

PIPING SYSTEM EVALUATED CALCULATED ALLOWED CORE SPRAY TESTLIHE 3.8 75.0 CONDENSATE MAKEUP 28.1 75.0 COHTAIHMENT SPRAY TEST 43.6 75.0

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Suppression Vessel Air Vent and Fill 15.7 75.0

. Suppre'ssion Vessel N2 Vent 68.2 75.0 and Fill

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