eCFR Analyzer

Nuclear Regulatory Commission (NRC)

1,411,153Words in 87 parts
13.4Restriction density (per 1,000 words)
21.7Reading grade
37.8%Unchanged since 2017
18Flagged parts
2026-11-03Last change

Section changes per year

From the eCFR versioner, for the parts that the agency owns now. Before 2017 is the baseline load.

Text and size

Sentences
38.9 words on average; 33.1% over 40 words; 38.0% passive; 13.6 cross-references per 1,000 words
Sentence types
definition 6.4% · prohibition 3.3% · paperwork 13.3% · obligation 26.5% · permission 9.4% · other 41.1%
Checksum
4639d55ac0ed679e4a06928bd3dd50c55734d0ae7e75ced5f5968157b6a1566c changed since last refresh

Review candidates in this agency

RankPartWordsScore
16 top 10% 10 CFR 35 MEDICAL USE OF BYPRODUCT MATERIAL
High signals: Paperwork share +2.7 SD · Reading grade +2.5 SD · Directive share +2.4 SD · Size +1.5 SD
 32,736 1.67
35 top 10% 10 CFR 32 SPECIFIC DOMESTIC LICENSES TO MANUFACTURE OR TRANSFER CERTAIN ITEMS CONTAINING BYPRODUCT MATERIAL
High signals: Reading grade +2.7 SD · Paperwork share +2.6 SD · Directive share +1.6 SD · Size +1.0 SD
 20,393 1.46
78 top 10% 10 CFR 40 DOMESTIC LICENSING OF SOURCE MATERIAL
High signals: Reading grade +2.0 SD · Paperwork share +1.7 SD · Size +1.7 SD · Directive share +1.4 SD
 41,130 1.20
83 top 10% 10 CFR 26 FITNESS FOR DUTY PROGRAMS
High signals: Directive share +2.2 SD · Size +2.2 SD · Reading grade +1.4 SD · Restriction density +1.2 SD
 75,739 1.19
111 top 10% 10 CFR 30 RULES OF GENERAL APPLICABILITY TO DOMESTIC LICENSING OF BYPRODUCT MATERIAL
High signals: Reading grade +1.7 SD · Paperwork share +1.7 SD · Directive share +1.4 SD · Size +1.4 SD
 30,035 1.12
169 top 10% 10 CFR 37 PHYSICAL PROTECTION OF CATEGORY 1 AND CATEGORY 2 QUANTITIES OF RADIOACTIVE MATERIAL
High signals: Paperwork share +1.7 SD · Directive share +1.7 SD · Restriction density +1.4 SD
 14,539 1.04
197 top 10% 10 CFR 10 CRITERIA AND PROCEDURES FOR DETERMINING ELIGIBILITY FOR ACCESS TO RESTRICTED DATA OR NATIONAL SECURITY INFORMATION OR AN EMPLOYMENT CLEARANCE
High signals: Reading grade +2.1 SD · Directive share +1.4 SD · Paperwork share +1.4 SD
 8,657 1.00
249 top 10% 10 CFR 39 LICENSES AND RADIATION SAFETY REQUIREMENTS FOR WELL LOGGING
High signals: Restriction density +1.7 SD · Directive share +1.6 SD · Paperwork share +1.3 SD
 7,482 0.93
250 top 10% 10 CFR 50 DOMESTIC LICENSING OF PRODUCTION AND UTILIZATION FACILITIES
High signals: Size +2.8 SD · Directive share +1.1 SD
 159,009 0.93
272 top 10% 10 CFR 73 PHYSICAL PROTECTION OF PLANTS AND MATERIALS
High signals: Size +2.5 SD · Directive share +1.7 SD · Restriction density +1.5 SD
 103,489 0.91
379 top 10% 10 CFR 2 AGENCY RULES OF PRACTICE AND PROCEDURE
High signals: Size +2.4 SD · Paperwork share +1.1 SD · Reading grade +1.0 SD
 98,168 0.83
439 top 10% 10 CFR 70 DOMESTIC LICENSING OF SPECIAL NUCLEAR MATERIAL
High signals: Paperwork share +1.7 SD · Size +1.5 SD · Reading grade +1.5 SD · Directive share +1.2 SD
 32,772 0.79
481 top 10% 10 CFR 36 LICENSES AND RADIATION SAFETY REQUIREMENTS FOR IRRADIATORS
High signals: Restriction density +2.8 SD · Directive share +2.0 SD
 9,433 0.77
517 top 10% 10 CFR 150 EXEMPTIONS AND CONTINUED REGULATORY AUTHORITY IN AGREEMENT STATES AND IN OFFSHORE WATERS UNDER SECTION 274
High signals: Reading grade +2.9 SD · Paperwork share +2.2 SD
 9,086 0.75
544 top 10% 10 CFR 19 NOTICES, INSTRUCTIONS AND REPORTS TO WORKERS: INSPECTION AND INVESTIGATIONS
High signals: Paperwork share +1.9 SD · Reading grade +1.4 SD
 5,279 0.74
594 top 10% 10 CFR 31 GENERAL DOMESTIC LICENSES FOR BYPRODUCT MATERIAL
High signals: Reading grade +1.3 SD · Directive share +1.1 SD
 6,848 0.73
601 top 10% 10 CFR 75 SAFEGUARDS ON NUCLEAR MATERIAL—IMPLEMENTATION OF SAFEGUARDS AGREEMENTS BETWEEN THE UNITED STATES AND THE INTERNATIONAL ATOMIC ENERGY AGENCY
High signals: Paperwork share +3.3 SD · Reading grade +1.0 SD
 11,642 0.72
624 top 10% 10 CFR 34 LICENSES FOR INDUSTRIAL RADIOGRAPHY AND RADIATION SAFETY REQUIREMENTS FOR INDUSTRIAL RADIOGRAPHIC OPERATIONS
High signals: Restriction density +1.3 SD · Directive share +1.2 SD
 10,582 0.71
656 10 CFR 4 NONDISCRIMINATION IN FEDERALLY ASSISTED PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE FROM THE COMMISSION
High signals: none above 1 SD; ranked by the combined score
 19,222 0.70
670 10 CFR 53 RISK-INFORMED, TECHNOLOGY-INCLUSIVE REGULATORY FRAMEWORK FOR COMMERCIAL NUCLEAR PLANTS
High signals: Size +2.2 SD · Paperwork share +1.1 SD
 80,739 0.69
884 10 CFR 74 MATERIAL CONTROL AND ACCOUNTING OF SPECIAL NUCLEAR MATERIAL
High signals: Paperwork share +1.7 SD · Reading grade +1.4 SD
 14,643 0.60
938 10 CFR 20 STANDARDS FOR PROTECTION AGAINST RADIATION
High signals: Size +1.5 SD
 34,429 0.58
1,043 10 CFR 12 IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN AGENCY PROCEEDINGS
High signals: Paperwork share +1.9 SD
 4,007 0.54
1,050 10 CFR 140 FINANCIAL PROTECTION REQUIREMENTS AND INDEMNITY AGREEMENTS
High signals: Reading grade +2.1 SD · Size +1.9 SD
 55,257 0.54
1,061 10 CFR 72 LICENSING REQUIREMENTS FOR THE INDEPENDENT STORAGE OF SPENT NUCLEAR FUEL, HIGH-LEVEL RADIOACTIVE WASTE, AND REACTOR-RELATED GREATER THAN CLASS C WASTE
High signals: Size +1.7 SD · Paperwork share +1.0 SD
 43,179 0.54

Score: the mean of six signals, in standard deviations (SD). Across the CFR, the top 641 of 6,402 ranked parts (10%) get a flag for review; this list shows 25. A flag is not a finding.

Statutes behind the most text

  • 42 U.S.C. 5841: 1,384,205 words in 75 parts (98.1% of this agency's text)
  • 44 U.S.C. 3504: 1,339,574 words in 46 parts (94.9% of this agency's text)
  • 42 U.S.C. 4332: 479,790 words in 7 parts (34.0% of this agency's text)
  • 42 U.S.C. 2014: 390,697 words in 9 parts (27.7% of this agency's text)
  • 42 U.S.C. 2073: 293,956 words in 10 parts (20.8% of this agency's text)
  • 42 U.S.C. 10226: 249,703 words in 3 parts (17.7% of this agency's text)
  • 42 U.S.C. 2133: 245,984 words in 4 parts (17.4% of this agency's text)
  • 42 U.S.C. 10155: 214,704 words in 6 parts (15.2% of this agency's text)
  • 42 U.S.C. 2201: 212,500 words in 35 parts (15.1% of this agency's text)
  • 42 U.S.C. 10134: 196,863 words in 4 parts (14.0% of this agency's text)

From the authority notes. A citation is not proof that the statute requires the rule.

Largest parts

  • 10 CFR 50: DOMESTIC LICENSING OF PRODUCTION AND UTILIZATION FACILITIES (159,009 words)
  • 10 CFR 73: PHYSICAL PROTECTION OF PLANTS AND MATERIALS (103,489 words)
  • 10 CFR 2: AGENCY RULES OF PRACTICE AND PROCEDURE (98,168 words)
  • 10 CFR 53: RISK-INFORMED, TECHNOLOGY-INCLUSIVE REGULATORY FRAMEWORK FOR COMMERCIAL NUCLEAR PLANTS (80,739 words)
  • 10 CFR 26: FITNESS FOR DUTY PROGRAMS (75,739 words)
  • 10 CFR 52: LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS (72,362 words)
  • 10 CFR 140: FINANCIAL PROTECTION REQUIREMENTS AND INDEMNITY AGREEMENTS (55,257 words)
  • 10 CFR 51: ENVIRONMENTAL PROTECTION REGULATIONS FOR DOMESTIC LICENSING AND RELATED REGULATORY FUNCTIONS (51,928 words)
  • 10 CFR 71: PACKAGING AND TRANSPORTATION OF RADIOACTIVE MATERIAL (43,831 words)
  • 10 CFR 72: LICENSING REQUIREMENTS FOR THE INDEPENDENT STORAGE OF SPENT NUCLEAR FUEL, HIGH-LEVEL RADIOACTIVE WASTE, AND REACTOR-RELATED GREATER THAN CLASS C WASTE (43,179 words)

Reading grade and sentence types are approximate. Simple rules label each sentence; the first match wins.