Document: NUREG-0800
Document ID: 2349ea77-1f6e-45e4-a2df-f56249a774f1
Document Type: srp
Title: CONTROL ROD DRIVE SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070364.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.4
CFR Part: 
CFR Title: 

Content:
ss 1, 2, or 3 as appropriate (Ref. 7) . 30 b. Pressurized Portions of Equipment Classified as Quality Group D (Regulatory Guide 1.26) (1) Section VIII, Division 1 of the ASME Code for vessels and pump casings (Ref. 7) . 31 (2) Applicable to Piping Systems (American National Standards Institute, ANSI):(1) B16.5 Steel Pipe Flanges and Flanged Fittings (Ref.erence 1315 ). 32 B16.9 Steel Butt Welding Fittings (Ref.erence 1416 ). 33 B16.11 Steel Socket Welding Fittings (Ref.erence 1517 ). 34 B16.25 Butt Welding Ends (Ref.erence 1618 ). 35 B16.34 Steel Valves with Flanged and Butt Welding Ends36 (Ref.erence 1919 ). 37 B31.1 Power Piping (Ref.erence 1720 ). 38 39 MSS-SP-25 StandardsMarking for Valves, Fittings, Flanges, and 40 Unions (Ref.erence 1821 ). 41 42 c. Nonpressurized Equipment (Non-ASME Code) Design margins presented for allowable stress, deformation, and fatigue should be equal to or greater than those for other plants of similar design having a period of successful operation. Justification of any decreases should be provided. 3. For the various design and service conditions defined in NB-3113 of Section III of the ASME Code (Ref. 7) , load combination sets are as given in Standard Review Plan 43 Section 3.9.3 (Ref. 12).44 DRAFT Rev. 3 - April 1996 3.9.4-6 The stress limits applicable to pressurized and nonpressurized portions of the control rod drive systems should be as given in Reference 12SRP Section 3.9.3 for the response to 45 each loading set. For BWRs, tThe CRDS design should adequately consider water 46 hammer loads to assure that system safety functions can be achieved. 4. The operability assurance program will be acceptable provided the observed performance as to wear, functioning times, latching, and overcoming a stuck rod meet system design requirements. Technical Rationale:47 The technical rationale for application of the above acceptance criteria to the CRDS is discussed in the following paragraphs: 1. GDC 1 and 10 CFR 50.55a establish